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Friday, 12 May 2023

How to make money online without investment

 

How to Earn Money Online without Investments for Students?

Being a student is often a very important phase in a person's life. However, studying is a full-time occupation, and so students who are looking to earn a bit of money start searching for part-time jobs that don’t affect their studies.

Other concerns for students are how to earn money online without making a large investment, or finding jobs that require minimal experience.

And here’s the good news. There are actually a number of online part-time jobs for students, where they can earn money at home.

What Are The Best Ways to Earn Money Online as a Student?

1. Sell Insurance as a POSP

Becoming a POSP, or Point of Salesperson, and selling insurance can be a lucrative part-time job for students. A POSP is an insurance agent who works with an insurance company to sell their insurance products online.

What are the requirements? - You must be over 18 years of age and should have completed Class 10. You also need to complete a 15-hour compulsory training offered by the IRDAI.How much can you earn? - Your income would depend on the number of policies you sell. Thus, the more policies you sell, the more income you will earn.Can you continue this job? - Yes, if you have an aptitude for selling, you can continue this later as a full-time job.

Find out more about the steps, requirements, and regulations for becoming a POSP agent here.

2. Take Up Freelancing

If you are someone who is good at writing, programming, editing, photography, designing, or any other such skills, you can earn money online as a freelancer. You just need to register yourself as a freelancer on portals like Upwork, Fiverr, or Truelancer. Then you can start marketing your skills to potential clients.

What are the requirements? - As long as you have a marketable skill, you can register on a freelancing portal, though this may require a small fee. How much can you earn? - Your income will be based on the kind of work you offer and how much work you have time to do.

Can you continue this job? - Yes, based on the kind of work you offer, you can continue to work full-time as a freelancer.

3. Start Tutoring Online

Students are constantly learning new things, so one easy way to earn money online is to share some of this knowledge. Whether you want to tutor school children or provide courses for adults who want to learn something new, all you need is access to a fast internet connection. 

You can either sign up with a virtual tutoring platform like Udemy, SkillShare, or Coursera, or simply reach out on social media to friends and relative circles to broadcast your online tutoring classes.

What are the requirements? - There is very little monetary investment involved, though you will need to brush up on some teaching skills.How much can you earn? - Based on your level of expertise and the subject matter, you can earn up to ₹200–500 per hour.

Can you continue this job? - While tutoring might not be a viable full-time job, you can either continue to do this part-time or if you show an aptitude for the same, look into teaching jobs in your area of study.

4. Find Data Entry Jobs

Another option for students looking to earn money online without investment is data entry jobs. Since it offers flexibility, this can be a good option for part-time work.

All you need to do is register at a trusted website like Freelancer, Data Plus, Axion Data Entry Services or Guru, and you can start accepting data entry jobs from companies worldwide. However, remember to check their legitimacy before transferring your account details.

What are the requirements? - You need to have access to a computer, as well as a good working knowledge of Excel and other Microsoft tools.How much can you earn? - With a data entry job, you can earn ₹300 to ₹1,500 per hour.Can you continue this job? - Data entry jobs are usually done part-time.

5. Beta Testing Apps and Websites

Since almost every student has access to a smartphone or a computer these days, one good option to earn money part-time for students is by testing out apps and websites. When companies and app developers create a new app or website, they hire users to do what is called ‘Beta Testing’. You just need to test out their sites or apps and report your user experience, and identify any bugs or problems, before they go live to the public.

You can sign up to do these jobs at sites like BetaTesting, Tester Work, Test.io, or TryMyUI. 

What are the requirements? - You don’t need any special knowledge but based on the product you are testing, you might need to have an up-to-date Android, iOS, or Windows operating system.How much can you earn? - Depending on the beta testing process, and your experience with the process, you can earn about ₹1000 to ₹3000.Can you continue this job? - App and website testing is usually done part-time, but if you have experience with programming or software development, you can use this experience in your future career.

So, students who are looking to earn money online can easily do so by spending a little bit of their free time in a more productive way. Just be careful to avoid fake agencies, scams, and frauds by doing the following: 

Researching any site thoroughly and checking their reviews before signing up.Be careful of any site that asks for your personal information.Look out for websites that have a lot of work involved, but won’t pay you much as compensation. Read any contract thoroughly before signing.

And once you have taken these precautions, you can follow these easy and time-friendly ways to make money without any investments.

How to Earn Money From Instagram इंस्टाग्राम से घर बैठे पैसे कैसे कमाएं, यहाँ से देखें आसान तरीका

How to Earn Money From Instagramइंस्टाग्राम अकाउंट कैसे बनाएंइंस्टाग्राम में अकाउंट बनने के बाद आपको क्या करना होगाइंस्टाग्राम पर फॉलोअर्स कैसे बढ़ाएंकोई कंपनी आपसे कैसे संपर्क करेगीआप Instagram से कितना पैसा कमा सकते हैं

How to Earn Money From Instagram

इंस्टाग्राम से पैसे कैसे कमाए How to Earn Money From Instagram, इंस्टाग्राम पर क्लिकबैंक से पैसे कैसे कमाए, फोटोग्राफी से इंस्टाग्राम पर पैसे कैसे कमाए, पैसे कैसे कमाए, ऑनलाइन पैसे कमाने के तरीके, ऑनलाइन पैसे कमाए, पीसी पर इंस्टाग्राम अकाउंट बनाएं, इंस्टाग्राम पर फॉलोअर्स बढ़ाएं

दोस्तों आज के समय में सोशल मीडिया जैसे इंस्टाग्राम, फेसबुक, ट्विटर और कई सोशल मीडिया साइट्स का लोग काफी इस्तेमाल करते हैं। जिसमें इंस्टाग्राम, facebook का उपयोग अधिक हो रहा है। इस पोस्ट में हम आपको Instagram से पैसे कमाने के आसान तरीके How to Earn Money From Instagram के बारे में बताने जा रहे हैं। क्योंकि आप इंस्टाग्राम का उपयोग करके घर बैठे आसानी से पैसे कमा सकते है। आज के समय में लोग सोशल मीडिया से लोग जुडते जा रहे है जिससे विज्ञापन कंपनियों का झुकाव भी इसकी तरफ अधिक हो रहा है। दुनिया की बड़ी बड़ी कंपनी अपने उत्पादों और सेवाओं के विज्ञापन के लिए सोशल मीडिया जैसी साइट का सहारा ले रही है।

आप भी सोशल मीडिया पर अधिक समय बीता रहे है तो इस समय का उपयोग करके इन वेबसाईट के माध्यम से घर बैठे आसानी से पैसे कमा सकते है। इंस्टाग्राम से पैसे कमाने के आसान तरीके इस पोस्ट में बताए गए है। इस पोस्ट में हम आपको इन विज्ञापन कंपनियों के बारे में बताएंगे कि कैसे आप किसी कंपनी का प्रचार करके लाखों कमा सकते हैं और यह भी कि कैसे आप Instagram में इसका इस्तेमाल करके बहुत सारे पैसे कम कर सकते हैं।

इंस्टाग्राम का उपयोग करके पैसे कमाने के लिए आपके पास एक Instagram में account होना जरुरी है इस इंस्टाग्राम का उपयोग करके आप पैसे कमा सकते है। यदि आपके पास इंस्टाग्राम अकाउंट नहीं है तो आप नीचे दिए गए स्टेप्स का उपयोग करके इंस्टाग्राम पर अपना अकाउंट बना सकते है। How to Earn Money From Instagram

इंस्टाग्राम अकाउंट कैसे बनाएं

Instagram में account बनाना बहुत ही आसान है इसके लिए आपको सबसे पहले google में Instagram सर्च करना होगाइसके बाद आपको सबसे पहले लिंक में क्लिक करना होगा।इसके बाद आपको क्रिएट एकाउंट पर क्लिक करना होगाउसके बाद आपको जीमेल आईडी या फेसबुक से अकाउंट बनाने के लिए कहा जाएगाआप फेसबुक से अपना इंस्टाग्राम अकाउंट भी बना सकते हैंअकाउंट बनाने के बाद आपको अपनी सारी डिटेल्स जैसे नाम नंबर, ईमेल आईडी डालनी होगी और अपनी फोटो डाल कर सेव पर क्लिक करना होगा।

इंस्टाग्राम में अकाउंट बनने के बाद आपको क्या करना होगा

आपने इंस्टाग्राम अकाउंट बना लिया है या आपके पास पहले से एक इंस्टाग्राम अकाउंट है तो अब आपको क्या करना होगा? आपको बता दें कि इंस्टाग्राम से पैसे कमाना इतना आसान नहीं है, आपको अपने इंस्टाग्राम आईडी पर ढेर सारे फॉलोअर्स लाने होंगे। आपके अकाउंट पर जीतने ज्यादा फॉलोवर्स होंगे आपको उतना ही अधिक लाभ मिलेगा। इसके लिए आप अपने इंस्टाग्राम पर अधिक से अधिक फॉलोवर्स बढ़ाएं।

इंस्टाग्राम पर फॉलोअर्स कैसे बढ़ाएं

इंस्टाग्राम पर फॉलोअर्स बढ़ाने के लिए आपको रोजाना इंस्टाग्राम पर एक्टिव रहना होगा और आपको हर दिन फोटो और स्टोरी इंस्टाग्राम पर अपलोड करनी होती है और आपको अपने इंस्टाग्राम अकाउंट में एक निचे सेलेक्ट करना होता है और उसी निचे पर आपको रोज लोगों को जानकारी देनी होती है। जिससे लोग आपके अकाउंट में रोज आएंगे और देखेंगे कि इस अकाउंट में हर रोज कुछ न कुछ जानकारी आती रहती है जिससे लोग आपके इंस्टाग्राम अकाउंट को इस तरह से फॉलो करेंगे जैसे जैसे आपके अकाउंट में फॉलोअर्स बढ़ेंगे आपके अकाउंट की अथॉरिटी बढ़ती जाएगी। How to Earn Money From Instagram

कोई कंपनी आपसे कैसे संपर्क करेगी

जब आपके इंस्टाग्राम अकाउंट पर फॉलोअर्स बढ़ जाएंगे तो कोई कंपनी आपसे कैसे संपर्क करेगी। जैसे-जैसे आपके फॉलोअर्स बढ़ेंगे, कई कंपनियां आपसे संपर्क करेंगी, उसके लिए आपके पास एक ईमेल आईडी होगी। फोन नंबर भी होना जरूरी है। अगर आप अपने इंस्टाग्राम अकाउंट में अपना फोन नंबर या ईमेल आईडी नहीं डालते हैं, How to Earn Money From Instagram तो कोई भी कंपनी आपसे संपर्क नहीं कर पाएगी, इसलिए आपके अकाउंट में कम से कम एक ईमेल आईडी होना जरूरी है, ताकि कोई आपसे संपर्क कर सके।

आप Instagram से कितना पैसा कमा सकते हैं

हमारे देश में लोग इंस्टाग्राम से लाखों रुपये How to Earn Money From Instagram रहे हैं मैं आपको बता दूं कि इंस्टाग्राम से सबसे ज्यादा लोग पैसे कमा रहे हैं जिसका नाम एक ब्रांड के रूप में है क्योंकि इस तरह के कई सेलेब्रिटीज हैं जो इंस्टाग्राम से ही हर महीने करोड़ों रुपए की कमाई करती हैं। ऐसा नहीं है कि केवल सिलेब्रिटी ही इंस्टाग्राम से पैसे कमा सकते हैं और कोई आम आदमी नहीं, आपको बता दें कि आज के समय में वह हर उस इंसान के इंस्टाग्राम से पैसे कमा सकते हैं जिसके इंस्टाग्राम में बहुत सारे फॉलोअर्स हैं और आप भी कमा सकते हैं।

लेकिन आपको ऊपर बताए गए सभी नियमों का पालन करना होगा How to Earn Money From Instagram कि आप हर रोज अपने अकाउंट में एक्टिव रहेंगे और अपने अकाउंट के जरिए लोगों को जरूरी और सही जानकारी देंगे और इसके साथ ही आप हमें इंस्टाग्राम पर भी फॉलो कर सकते हैं। हमें इंस्टाग्राम पर फॉलो करने के लिए आप हमें नीचे दिए गए इंस्टाग्राम के आइकन पर क्लिक करके फॉलो कर सकते हैं हम आपको वहां नई नई जानकारी देते रहते हैं और साथ ही अगर आपका कोई सवाल है तो वहां हमसे पूछ भी सकते हैं। How to Earn Money From Instagram

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Friday, 5 May 2023

Buddha Birthday 2023 || Buddha birthday celebration

 Buddhism 

Buddha's Birthday or "'Buddha Day"' is a Buddhist festival that is celebrated in most of East Asia and South Asia commemorating the birth of the Prince Siddhartha Gautama, later the Gautama Buddha, who was the founder of Buddhism. Wikipedia

बुद्ध पूर्णिमा बौद्ध धर्म में आस्था रखने वालों का एक प्रमुख त्यौहार है। यह बैसाख माह की पूर्णिमा को मनाया जाता है। बुद्ध पूर्णिमा के दिन ही गौतम बुद्ध का जन्म हुआ था, इसी दिन उन्हें ज्ञान की प्राप्ति हुई थी और इसी दिन उनका महानिर्वाण भी हुआ था। ५६३ atOptions = { 'key' : '6e28cdf0f29dc294a6bf6465c031890c', 'format' : 'iframe', 'height' : 90, 'width' : 728, 'params' : {} }; document.write('');

ई.पू. विकिपीडिया">ई.पू. विकिपीडिया

Buddha’s Birthday

Buddhists often consider the Buddha’s birthday an occasion for celebration, and Chinese, Thai, and Japanese temples in America all celebrate differently

On a Sunday in May, in the great hall of the Hsi Lai Temple in California, over 400 people gather beneath the three enormous golden Buddhas—Shakyamuni, Amitabha, and Bhaishajya-guru. A woman’s voice announces over the loudspeaker that 2,535 years ago, the Buddha was born in the Lumbini Garden in present day Nepal: “The Buddha is like a lamp in this world of suffering, shining the way for us,” she says. “We have a special ceremony in which we symbolically bathe the image of the baby Buddha. It is, in a sense, to clean the Buddha. But it is more to purify our own defilements within ourselves. As our clothing gets dirty and needs to be changed, so our minds—our selves—need change and renewal. The pure nature of the Buddha is innate in us all. It is covered up with these defilements. We need to clean off the dirt so that we can shine. So when we bathe the Buddha, keep in mind that what we want to purify is our own defilements, so that our pure nature can shine. If you would like to transfer the merit you gain from this act to others, do so.”

Reverently, the crowd moves out of the temple hall to participate in bathing the baby Buddha, each taking a long handled bamboo ladle to pour a cup of sweetened tea over the small image, standing in a basin of flowers at the temple door. Since this is an important day for the tradition, there is a “Refuge Ceremony” for those who wish to become Buddhists by taking refuge in the Buddha, the Dharma, and the Sangha.

In the Chinese Buddhist tradition, the birthday of the Buddha is observed in the spring. In the Theravada traditions, this day is called Visakha or Vesak, the full moon of the month of Visakha, which usually falls in May. It celebrates three significant events—the birth, the enlightenment, and the death of the Buddha. At Wat Dhammaram in Chicago, as at temples throughout Thailand, the laity circumambulate the temple in procession, bearing lighted candles, incense, and flowers.

In the Japanese tradition of the Buddhist Churches of America, the Buddha’s birthday is observed on April 8, a day called Hanmatsuri. On Hanmatsuri, the traditional story of the Buddha’s birth is told. Queen Maya dreamed that a white elephant entered her body and the Prince Siddhartha was born. He was born standing up and took seven steps. He is said to have raised his right hand and declared, “Above heaven and below heaven, I alone am the World Honored One.” In the sanctuary, the altar bearing the image of the baby Buddha rests on the back of a white elephant. Pouring ladles of sweetened tea on the baby Buddha, they say, recalls the rain of flowers that fell in the Lumbini Garden when the Buddha was born. Meanwhile, in the Dharma School, children draw pictures of the Buddha’s birth and tell the 

Thursday, 4 May 2023

Live IPL today match

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How to make money without investment || proven ways make money online $50 daily

 


 Earn money online without investment – 15 Ways to Make Money

Earn money online without investment – 15 Ways to Make Money

Join all ways : click 

Often people think of starting their own business but they do not have much money to invest in the business. In such a situation, they look for ways where they can make money online without investment.

If you are also looking to  online without investment, then this article of ours is going to help you a lot. With the easy accessibility and growing popularity of the internet, earning money online has become quite easy. So why not earn money online free and keep ourselves away from the debt trap?



In today’s article, earn money without investment, we are going to tell you about 15 best ways from where you can earn money sitting at home without investing any money.

Don’t miss the opportunity to earn money online

15 Ways to earn money online without investment

Education Sector: Earn Money Without Investment

If you want to make money online without investment then the education sector is the best option. This is such a sector from which you will be able to make money smartly that too without investment. Whatever knowledge you have in education, you can earn money by sharing it with people. In today’s time, you can teach children through offline or online methods. Moreover, you can share your knowledge through Youtube videos and earn money. In the education sector, not a single rupee will be spent from your pocket, you just have to share your knowledge.

Write an E-book and Earn Money Online

E-book is a digital form of book, in which paper is not used and it is prepared in pdf format. The full form of e-book is electronic book. We can read e-book only on any electronic device like mobile, computer or kindle. E-books are also a very good tool to make money online without investment if you are interested in writing. Normal books contain only text and images, but E-book is full of animation. You can add text and photos as well as animations like Video, Gif, Audio, which people enjoy reading a lot. You can make a lot of money by selling the book on Amazon or Flipkart. The easiest way to publish an e-book is through the Amazon kindle program.

Start Earning With Money Club Digital Chit Fund
Freelancing Services

Doing freelance work is another one of the great ways to earn money online for free without investment. If you  atOptions = { 'key' : '2c24702322a7dc3baec9a2c8383a76c2', 'format' : 'iframe', 'height' : 50, 'width' : 320, 'params' : {} }; document.write(''); href="https://moneyclubber.com/blog/need-money-urgently/">need money urgently, you can register on one of the sites and earn some extra money. You can select from the opportunities that are offered based on your skills. Some of the top freelancing sites where you can register yourself as a freelancer and search for free online jobs without investment are: Freelancer, PeoplePerHour, Fiverr, Upwork and Design Crowd. 

Refer and Earn to Make Money Online

Refer and Earn is a way to earn money. In this, you just have to share your referral link with your friends, relatives on social media. When someone clicks on that link and signs up, you get some money as a bonus.

RojDhan, CashKaro, Pocket Money, Paytm Money, Google Pay, The Money Club are some such refer and earn apps. Read this article to know the 

href="https://moneyclubber.com/blog/which-is-the-best-refer-and-earn-app-in-india/">Top 10 Refer and earn apps.

If you are interested in earning money sitting at home, Money Club is the best way to do it. You can invest a small amount and get a high return on your investment. The Money Club is a trusted online chit fund platform, and its referral program provides an opportunity to earn money by referring new members. This platform also gives you an opportunity to Become an Agent and earn Rs 20,000 per month or more.

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Graphic Design

Images are more attractive than just words thus graphic design makes full use of them to attract the attention of people. If you are creative and know about graphic design, it is the perfect way to earn money online without investment. Even if you don’t have the skill you can learn it within a couple of months. You can work on Fiverr, Upwork, ManyPixels, 99designs, Freelancer.com by creating your account and earn good money.

Captcha Solver: Make Money Online Without Investment

If you want to make money online without investment then you can become a Captcha Solver. However, you need to devote more time to it. You will find many captcha solver sites like CaptchaTypers, ProTypers, Captcha2Cash, 2Captcha, Qlinkgroup, VirtualBee etc where you can earn money by solving captcha images and exact characters.

Sell your Photos to Earn Money Online

Does photography interest you? Do you love taking photographs of nature or for that matter anything beautiful under the sky? Then selling them for some money is one of the best free online ways to earn money without investment. You just need your talent for clicking photos. Above all, the power of your phone cameras is enough to give you pristine quality pictures, you don’t even need a DSLR to click photos. There are many websites where you can sell your photos: Adobe Stock, Shutterstock, Etsy, Fotomoto, Pixabay.

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Earn Money with Online Surveys

You can earn money by taking online surveys! Sounds interesting! Yes, there are several market research companies where you can take online surveys and earn money without investment. These companies send you simple online surveys, where it asks for your feedback on some products or services. Your feedback helps these companies to create better products.

Taking an online survey is quite simple because there are just several answers available for you to choose from. Your responses have no right or wrong because they reflect only your personal perspective. Depending on the length of the surveys, it may take 5 minutes to 30 minutes to complete a survey. You can make as much as Rs. 1000 per day by only spending 2-3 hours daily.

Earn Money From Your Smartphone

You may earn some extra money by using a variety of money-making apps that are readily available in the iOS and Google Play stores. Here are 10 best money-earning apps that, if you install and use on your mobile, you can make an extra income every month which depends on the time you invest.

Millions of users have given these mobile apps a rating of 4 stars or higher. Not every app needs to be installed. Install a few apps to start, and if you like them, you can add more. You have to play games, watch videos, sign up for other websites, install other apps, fulfill numerous offers, and complete easy online surveys. Simply earn money when you are travelling or waiting for someone.

Test Apps and Websites

App and website testing is another of the best and simplest ways to earn money online without investment. Before their application or website is made available to the general public, brands and app developers want what is known as “Beta testing” of it. A chosen set of people are given online work to test the software and report back on its usability and bugs.

These online testing jobs can be found on some of the following websites: TryMyUI, User Testing, UserZoom, Test Birds, etc.

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Earn Money by Doing SEO

SEO plays a very important role to grow any website. More traffic comes to your website only when SEO has been used properly in your content. Big companies hire SEO experts to bring their website/content to the search engines. Those who have good knowledge of SEO are paid a lot. If you also have a good knowledge of SEO, then you can earn very well through it.

Become A Virtual Assistant And Earn Money Online For Free

You can do all the work online by becoming a Virtual Assistant or Personal Assistant. You don’t need to go anywhere. The main work of a virtual assistant is to schedule appointments, make phone calls, make travel arrangements and manage email. HireMyMom, MyTasker, Zirtual, uAssistMe,123Employee are some websites where you can do this work.

Make Money By Training and Consultancy

Do you have any skills that are much in demand? You could be knowledgeable on a variety of subjects like the stock market, motivation, managing funds, nutrition, entrepreneurship, etc. If you build a training programme or online course around your expertise and sell it, the potential is enormous. Through Facebook or Instagram, people are making a  marketing these courses. You can design a landing page where you can explain your product and the advantages it offers customers. Simply direct Facebook or Instagram users to your product page, where you can then sell it.  Additionally, you can generate free traffic through Google search, YouTube, and numerous other social media sites.

 Passive Income Ideas To Help You Make Money And Wealth


Translation Online Jobs without investment

Become a translator if you are fluent in more than one language and have the necessary credentials. These kinds of jobs are outsourced by numerous businesses. You can apply for these kinds of jobs to make money while staying at home. Some businesses have job profiles for translating certain texts, emails, mails, or subtitles. Companies pay according to how many words are translated. With this skill, you have a wide range of opportunities. On freelance websites like Upwork or Fiverr as well as on more specialized platforms like Gengo, TranslatorsCafe, OneHourTranslation.com you can find translation jobs.

Earn Money For Free with Reddit

Reddit is more than just news updates. In fact, there are numerous ways to make money on Reddit if you know which subreddits to join. There are plenty of freelance related subreddits where you can find work in fields like: blog writing, copywriting, graphic design, photography, coding, social media, tutoring and lots more.  You can post about the services and rates you have to offer or browse postings for various work opportunities. 

Conclusion

You can choose from countless alternatives and options to generate quick money online. These were the 15 ways to earn money online without investment. Try to stick with one for a while to see which is effective and which is not. One of the most frequent errors people make is to attempt several possibilities at once, never considering the potential of just one. Additionally, you should always make better use of your time and work harder. Making some extra money while at home is simple

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Wednesday, 3 May 2023

Live IPL today match free

 Watch live IPL today match free 

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Manachestar city 2023 game live update

 

Manchester City Football Club is an English football club based in Manchester that competes in the Premier League, the top division in the English football...

2022–23 Manchester City F.C. season

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The City of Manchester Stadium in Manchester, England, also known as the Etihad Stadium for sponsorship reasons, is the home of Premier League club Manchester...

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Manchester (/ˈmæntʃɪstər, -tʃɛs-/) is a city and metropolitan borough in the county of Greater Manchester, England. It had a population of 552,000 in...

Greater Manchester

Greater Manchester, but land use is mostly urban—the product of concentric urbanisation]]med by Manchester city centre and the adjoining city of Salford...

Manchester City Council

Manchester City Council is the local authority for Manchester, a city and metropolitan borough in Greater Manchester, England. Manchester is the sixth...

2017–18 Manchester City F.C. season

The 2017–18 season was Manchester City's 116th season of competitive football, 89th season in the top flight of English football and 21st season in the...

List of Manchester City F.C. seasons

Manchester City Football Club is an English professional association football club based in Manchester, that currently plays in the Premier League. The...

Manchester City F.C. in international football

dir="ltr">Manchester City Football Club, an English professional association football club, has gained entry to Union of European Football Associations (UEFA) competitions...

2019–20 Manchester City F.C. season

The 2019–20 season was Manchester City's 118th season of competitive football, 91st season in the top flight of English football and 23rd season in the...

2011–12 Manchester City F.C. season

City v Manchester City Manchester City v Chelsea Stoke City v Manchester City Manchester City v Sunderland Arsenal v Manchester City Manchester City v...

2021–22 Manchester City F.C. season

Manchester City Football Club and their 20th consecutive season in the top flight of English football. In addition to the domestic league, Manchester...

2020–21 Manchester City F.C. season

The 2020–21 season was Manchester City Football Club's 119th in existence and their 19th consecutive season in the top flight of English football. In...

atOptions = { 'key' : '2c24702322a7dc3baec9a2c8383a76c2', 'format' : 'iframe', 'height' : 50, 'width' : 320, 'params' : {} }; document.write('');

dir="ltr">Manchester City F.C. ownership and finances

Manchester City Football Club dates back to 1894, when Ardwick A.F.C. dissolved and were reformed as Manchester City Football Club Ltd. Over recent years...

Manchester City W.F.C.

Tuesday, 2 May 2023

know Basics : Know Your Brain

 

Known Basic : About Human Brain

A brain is an organ that serves as the center of the nervous system in all vertebrate and most invertebrate animals. It is located in the head, usually close to the sensory organs for senses such as vision. It is the most complex organ in a vertebrate's body. In a human, the cerebral cortex contains approximately 14–16 billion neurons,[1] and the estimated number of neurons in the cerebellum is 55–70 billion.[2] Each neuron is connected by synapses to several thousand other neurons. These neurons typically communicate with one another by means of long fibers called axons, which carry trains of signal pulses called action potentials to distant parts of the brain or body targeting specific recipient cells.

Brain

The brain of a chimpanze

Anatomical terminology

Physiologically, brains exert centralized control over a body's other organs. They act on the rest of the body both by generating patterns of muscle activity and by driving the secretion of chemicals called hormones. This centralized control allows rapid and coordinated responses to changes in the environment. Some basic types of responsiveness such as reflexes can be mediated by the spinal cord or peripheral ganglia, but sophisticated purposeful control of behavior based on complex sensory input requires the information integrating capabilities of a centralized brain.

The operations of individual brain cells are now understood in considerable detail but the way they cooperate in ensembles of millions is yet to be solved.[3] Recent models in modern neuroscience treat the brain as a biological computer, very different in mechanism from an electronic computer, but similar in the sense that it acquires information from the surrounding world, stores it, and processes it in a variety of ways.

This article compares the properties of brains across the entire range of animal species, with the greatest attention to vertebrates. It deals with the human brain insofar as it shares the properties of other brains. The ways in which the human brain differs from other brains are covered in the human brain article. Several topics that might be covered here are instead covered there because much more can be said about them in a human context. The most important that are covered in the human brain article are brain disease and the effects of brain damage.

Anatomy

Cross section of the olfactory bulb of a rat, stained in two different ways at the same time: one stain shows neuron cell bodies, the other shows receptors for the neurotransmitter GABA.

The shape and size of the brain varies greatly between species, and identifying common features is often difficult.[4] Nevertheless, there are a number of principles of brain architecture that apply across a wide range of species.[5] Some aspects of brain structure are common to almost the entire range of animal species;[6] others distinguish "advanced" brains from more primitive ones, or distinguish vertebrates from invertebrates.[4]

The simplest way to gain information about brain anatomy is by visual inspection, but many more sophisticated techniques have been developed. Brain tissue in its natural state is too soft to work with, but it can be hardened by immersion in alcohol or other fixatives, and then sliced apart for examination of the interior. Visually, the interior of the brain consists of areas of so-called grey matter, with a dark color, separated by areas of white matter, with a lighter color. Further information can be gained by staining slices of brain tissue with a variety of chemicals that bring out areas where specific types of molecules are present in high concentrations. It is also possible to examine the microstructure of brain tissue using a microscope, and to trace the pattern of connections from one brain area to another.[7]

Cellular structure

Neurons generate electrical signals that travel along their axons. When a pulse of electricity reaches a junction called a synapse, it causes a neurotransmitter chemical to be released, which binds to receptors on other cells and thereby alters their electrical activity.

The brains of all species are composed primarily of two broad classes of cells: neurons and glial cells. Glial cells (also known as glia or neuroglia) come in several types, and perform a number of critical functions, including structural support, metabolic support, insulation, and guidance of development. Neurons, however, are usually considered the most important cells in the brain.[8] The property that makes neurons unique is their ability to send signals to specific target cells over long distances.[8] They send these signals by means of an axon, which is a thin protoplasmic fiber that extends from the cell body and projects, usually with numerous branches, to other areas, sometimes nearby, sometimes in distant parts of the brain or body. The length of an axon can be extraordinary: for example, if a pyramidal cell (an excitatory neuron) of the cerebral cortex were magnified so that its cell body became the size of a human body, its axon, equally magnified, would become a cable a few centimeters in diameter, extending more than a kilometer.[9] These axons transmit signals in the form of electrochemical pulses called action potentials, which last less than a thousandth of a second and travel along the axon at speeds of 1–100 meters per second. Some neurons emit action potentials constantly, at rates of 10–100 per second, usually in irregular patterns; other neurons are quiet most of the time, but occasionally emit a burst of action potentials.[10]

Axons transmit signals to other neurons by means of specialized junctions called synapses. A single axon may make as many as several thousand synaptic connections with other cells.[8] When an action potential, traveling along an axon, arrives at a synapse, it causes a chemical called a neurotransmitter to be released. The neurotransmitter binds to receptor molecules in the membrane of the target cell.[8]

Synapses are the key functional elements of the brain.[11] The essential function of the brain is cell-to-cell communication, and synapses are the points at which communication occurs. The human brain has been estimated to contain approximately 100 trillion synapses;[12] even the brain of a fruit fly contains several million.[13] The functions of these synapses are very diverse: some are excitatory (exciting the target cell); others are inhibitory; others work by activating second messenger systems that change the internal chemistry of their target cells in complex ways.[11] A large number of synapses are dynamically modifiable; that is, they are capable of changing strength in a way that is controlled by the patterns of signals that pass through them. It is widely believed that activity-dependent modification of synapses is the brain's primary mechanism for learning and memory.[11]

Most of the space in the brain is taken up by axons, which are often bundled together in what are called nerve fiber tracts. A myelinated axon is wrapped in a fatty insulating sheath of myelin, which serves to greatly increase the speed of signal propagation. (There are also unmyelinated axons). Myelin is white, making parts of the brain filled exclusively with nerve fibers appear as light-colored white matter, in contrast to the darker-colored grey matter that marks areas with high densities of neuron cell bodies.[8]

left;">Evolution

Main article: Evolution of the brain

Generic bilaterian nervous system

Nervous system of a generic bilaterian animal, in the form of a nerve cord with segmental enlargements, and a "brain" at the front

Except for a few primitive organisms such as sponges (which have no nervous system)[14] and cnidarians (which have a nervous system consisting of a diffuse nerve net[14]), all living multicellular animals are bilaterians, meaning animals with a bilaterally symmetric body shape (that is, left and right sides that are approximate mirror images of each other).[15] All bilaterians are thought to have descended from a common ancestor that appeared late in the Cryogenian period, 700–650 million years ago, and it has been hypothesized that this common ancestor had the shape of a simple tubeworm with a segmented body.[15] At a schematic level, that basic worm-shape continues to be reflected in the body and nervous system architecture of all modern bilaterians, including vertebrates.[16] The fundamental bilateral body form is a tube with a hollow gut cavity running from the mouth to the anus, and a nerve cord with an enlargement (a ganglion) for each body segment, with an especially large ganglion at the front, called the brain. The brain is small and simple in some species, such as nematode worms; in other species, including vertebrates, it is the most complex organ in the body.[4] Some types of worms, such as leeches, also have an enlarged ganglion at the back end of the nerve cord, known as a "tail brain".[17]

There are a few types of existing bilaterians that lack a recognizable brain, including echinoderms and tunicates. It has not been definitively established whether the existence of these brainless species indicates that the

earliest bilaterians lacked a brain, or whether their ancestors evolved in a way that led to the disappearance of a previously existing brain structure.

Invertebra

Fruit flies (Drosophila) have been extensively studied to gain insight into the role of genes in brain development.

This category includes tardigrades, arthropods, molluscs, and numerous types of worms. The diversity of invertebrate body plans is matched by an equal diversity in brain structures.[18]

Two groups of invertebrates have notably complex brains: arthropods (insects, crustaceans, arachnids, and others), and cephalopods (octopuses, squids, and similar molluscs).[19] The brains of arthropods and cephalopods arise from twin parallel nerve cords that extend through the body of the animal. Arthropods have a central brain, the supraesophageal ganglion, with three divisions and large optical lobes behind each eye for visual processing.[19] Cephalopods such as the octopus and squid have the largest brains of any invertebrates.[20]

There are several invertebrate species whose brains have been studied intensively because they have properties that make them convenient for experimental work:

Fruit flies (Drosophila), because of the large array of techniques available for studying their genetics, have been a natural subject for studying the role of genes in brain development.[21] In spite of the large evolutionary distance between insects and mammals, many aspects of Drosophila neurogenetics have been shown to be relevant to humans. The first biological clock genes, for example, were identified by examining Drosophila mutants that showed disrupted daily activity cycles.[22] A search in the genomes of vertebrates revealed a set of analogous genes, which were found to play similar roles in the mouse biological clock—and therefore almost certainly in the human biological clock as well.[23] Studies done on Drosophila, also show that most neuropil regions of the brain are continuously reorganized throughout life in response to specific living conditions.[24]The nematode worm Caenorhabditis elegans, like Drosophila, has been studied largely because of its importance in genetics.[25] In the early 1970s, Sydney Brenner chose it as a model organism for studying the way that genes control development. One of the advantages of working with this worm is that the body plan is very stereotyped: the nervous system of the hermaphrodite contains exactly 302 neurons, always in the same places, making identical synaptic connections in every worm.[26] Brenner's team sliced worms into thousands of ultrathin sections and photographed each one under an electron microscope, then visually matched fibers from section to section, to map out every neuron and synapse in the entire body.[27] The complete neuronal wiring diagram of C.elegans – its connectome was achieved.[28] Nothing approaching this level of detail is available for any other organism, and the information gained has enabled a multitude of studies that would otherwise have not been possible.[29]The sea slug Aplysia californica was chosen by Nobel Prize-winning neurophysiologist Eric Kandel as a model for studying the cellular basis of learning and memory, because of the simplicity and accessibility of its nervous system, and it has been examined in hundreds of experiments.[30]

Vertebrates

The brain of a shark

The first vertebrates appeared over 500 million years ago (Mya), during the Cambrian period, and may have resembled the modern hagfish in form.[31] Jawed fish appeared by 445 Mya, amphibians by 350 Mya, reptiles by 310 Mya and mammals by 200 Mya (approximately). Each species has an equally long evolutionary history, but the brains of modern hagfishes, lampreys, sharks, amphibians, reptiles, and mammals show a gradient of size and complexity that roughly follows the evolutionary sequence. All of these brains contain the same set of basic anatomical components, but many are rudimentary in the hagfish, whereas in mammals the foremost part (the telencephalon) is greatly elaborated and expanded.[32]

Brains are most commonly compared in terms of their size. The relationship between brain size, body size and other variables has been studied across a wide range of vertebrate species. As a rule, brain size increases with body size, but not in a simple linear proportion. In general, smaller animals tend to have larger brains, measured as a fraction of body size. For mammals, the relationship between brain volume and body mass essentially follows a power law with an exponent of about 0.75.[33] This formula describes the central tendency, but every family of mammals departs from it to some degree, in a way that reflects in part the complexity of their behavior. For example, primates have brains 5 to 10 times larger than the formula predicts. Predators tend to have larger brains than their prey, relative to body size.[34]

The main subdivisions of the embryonic vertebrate brain (left), which later differentiate into structures of the adult brain (right)

All vertebrate brains share a common underlying form, which appears most clearly during early stages of embryonic development. In its earliest form, the brain appears as three swellings at the front end of the neural tube; these swellings eventually become the forebrain, midbrain, and hindbrain (the prosencephalon, mesencephalon, and rhombencephalon, respectively). At the earliest stages of brain development, the three areas are roughly equal in size. In many classes of vertebrates, such as fish and amphibians, the three parts remain similar in size in the adult, but in mammals the forebrain becomes much larger than the other parts, and the midbrain becomes very small.[8]

The brains of vertebrates are made of very soft tissue.[8] Living brain tissue is pinkish on the outside and mostly white on the inside, with subtle variations in color. Vertebrate brains are surrounded by a system of connective tissue membranes called meninges that separate the skull from the brain. Blood vessels enter the central nervous system through holes in the meningeal layers. The cells in the blood vessel walls are joined tightly to one another, forming the blood–brain barrier, which blocks the passage of many toxins and pathogens[35] (though at the same time blocking antibodies and some drugs, thereby presenting special challenges in treatment of diseases of the brain).[36]

dir="ltr">Neuroanatomists usually divide the vertebrate brain into six main regions: the telencephalon (cerebral hemispheres), diencephalon (thalamus and hypothalamus), mesencephalon (midbrain), cerebellum, pons, and medulla oblongata. Each of these areas has a complex internal structure. Some parts, such as the cerebral cortex and the cerebellar cortex, consist of layers that are folded or convoluted to fit within the available space. Other parts, such as the thalamus and hypothalamus, consist of clusters of many small nuclei. Thousands of distinguishable areas can be identified within the vertebrate brain based on fine distinctions of neural structure, chemistry, and connectivity.[8]

The main anatomical regions of the vertebrate brain, shown for shark and human. The same parts are present, but they differ greatly in size and shape.

Although the same basic components are present in all vertebrate brains, some branches of vertebrate evolution have led to substantial distortions of brain geometry, especially in the forebrain area. The brain of a shark shows the basic components in a straightforward way, but in teleost fishes (the great majority of existing fish species), the forebrain has become "everted", like a sock turned inside out. In birds, there are also major changes in forebrain structure.[37] These distortions can make it difficult to match brain components from one species with those of another species.[38]

Here is a list of some of the most important vertebrate brain components, along with a brief description of their functions as currently understood:

See also: List of regions in the human brain

The medulla, along with the spinal cord, contains many small nuclei involved in a wide variety of sensory and involuntary motor functions such as vomiting, heart rate and digestive processes.[8]The pons lies in the brainstem directly above the medulla. Among other things, it contains nuclei that control often voluntary but simple acts such as sleep, respiration, swallowing, bladder function, equilibrium, eye movement, facial expressions, and posture.[39]The hypothalamus is a small region at the base of the forebrain, whose complexity and importance belies its size. It is composed of numerous small nuclei, each with distinct connections and neurochemistry. The hypothalamus is engaged in additional involuntary or partially voluntary acts such as sleep and wake cycles, eating and drinking, and the release of some hormones.[40]The thalamus is a collection of nuclei with diverse functions: some are involved in relaying information to and from the cerebral hemispheres, while others are involved in motivation. The subthalamic area (zona incerta) seems to contain action-generating systems for several types of "consummatory" behaviors such as eating, drinking, defecation, and copulation.[41]The cerebellum modulates the outputs of other brain systems, whether motor-related or thought related, to make them certain and precise. Removal of the cerebellum does not prevent an animal from doing anything in particular, but it makes actions hesitant and clumsy. This precision is not built-in but learned by trial and error. The muscle coordination learned while riding a bicycle is an example of a type of neural plasticity that may take place largely within the cerebellum.[8] 10% of the brain's total volume consists of the cerebellum and 50% of all neurons are held within its structure.[42]The optic tectum allows actions to be directed toward points in space, most commonly in response to visual input. In mammals, it is usually referred to as the superior colliculus, and its best-studied function is to direct eye movements. It also directs reaching movements and other object-directed actions. It receives strong visual inputs, but also inputs from other senses that are useful in directing actions, such as auditory input in owls and input from the thermosensitive pit organs in snakes. In some primitive fishes, such as lampreys, this region is the largest part