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  • Homo Sapiens

    Hemoglobin is a component of red blood cells that belongs to the group of proteins. It consists of 96% of the protein substance globin and 4% of the substance with a 2-valent iron atom - heme. One red blood cell contains about 280 million molecules of this substance, which forms the red color of blood.

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  • Homo Sapiens

    What's the difference between HIV and AIDS? HIV is a human immunodeficiency virus. HIV destroys the human immune system gradually and over time (5-10 years for most people) results in a condition called AIDS — Acquired Immune Deficiency Syndrome. AIDS manifests itself in a variety of ways. Some people suffer from upper respiratory tract infections, while others experience cancer and skin infections. Many times, people get tuberculosis in the background of AIDS.

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  • Homo Sapiens

    Model of artificial ventricles for the pediatric heart presented at the world congress on pediatric surgery in Barcelona. Currently, the artificial heart cannot serve as a full-fledged replacement for the real one and only used if the patient has to wait for a donor heart.

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    Google is in Telegram now — @google! The world's largest corporation invites you to join the community!

  • Homo Sapiens

    Facial recognition embedded in our brains The visual cortex contains neurons dedicated to this. What traits does the brain "pick up" first? The shape of the eyes👀 So the neurons make the first conclusion — whether or not this is a human face. Then the brain compares it with other images stored in memory, and identifies a familiar person. When this area of the cortex is affected, "recognition" is lost☝🏻 Yet visual acuity may remain at the same level, since other neurons are responsible for it.

  • Homo Sapiens

    Power Molecules Here's an interesting process of how transport proteins compete for a particle☝🏻 Eventually, one transport protein proves to be "stronger" than the other and takes the molecule in the right direction.

  • Homo Sapiens

    The animation represents the process of a coronavirus leaving the Golgi apparatus. That's the part of the cell tasked with exocytosis — releasing various particles and elements from the cell. Among them are viruses, which reproduce in the cell. After the coronavirus leaves the Golgi apparatus it goes free to swim through the body.

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    Why does the head of this fish chew through the jar even after death? The author of the channel Why? carried out an experiment and answered this question. Daily he answers the most bizarre "Why?" of his subscribers: - Why do women scream during sex? - Why don't we remember being born? - Why does our own voice piss us off? Ask your question — @why_eng

  • Homo Sapiens

    How long can one look at the sun without harming eyesight? Zero! Looking at the sun is extremely hazardous as the retina lacks pain receptors. So, you won't even feel any damage👐🏻 In just a few seconds, the cells are irreversibly destroyed. The sun emits infrared and ultraviolet rays that hit the retina. And right there is an area of highly sensitive cells called the "yellow spot" – the place of greatest visual acuity.

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    🔥 @Lewkcom, a new #SocialFi startup founded by ex- Binance.com, Tiktok.com, and Crypto.com employees, raised $3.26m from Private investors (Yahoo). Lewk will connect creators with publishers in an ads marketplace that's offering auto payouts of rewards through blockchain. The platform will also provide creators with a rich social media content portfolio showcasing features and unprecedented options for monetizing their content through crypto. ❔ Are you a content creator on Tiktok, Instagram, Youtube, or Twitter? ❔ Are you a brand or a publisher looking to promote your product or service? ❔ Are you a crypto investor looking for the next token to invest in? █ Register for the waitlist today! ┗ Telegram ┗ Twitter ┗ Discord ┗ Coinmarketcap ┗ Litepaper

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    Anesthetizing contractions Doctors attempt to relieve the woman in labor's pain by giving her a gaseous anesthetic to inhale. A nurse watches over the patient. 1939.

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    Eye Test What do you see in the picture? @Facts

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    Is it harmful to eat fruits and vegetables grown with "chemicals" (e.g., pesticides)? Fear of all fertilizers is precisely not worth it: humanity has progressed quite strongly in this area over the past century, both in terms of safety and proper concentrations. Speaking of which, one way to reduce contact with fertilizers is to consume more GMOs (one of the purposes of genetic modification in agriculture is to cut down on the amount of fertilizers used).

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    Still reading books for self-development in 2021? That's a pretty long way to go! Self-expert|Author's blog - An expert blog that puts out the most beneficial daily squeeze on self-education! - Checklists for planning - Habits of successful people - Podcasts: tips and motivation - Insights, techniques, and self-development methods Subscribe to Self-expert|Author's blog and start developing!

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    How great is the risk to mankind of dying from an ancient, unexplored virus awakened by melting ice? The risk is negligible for two reasons. The first. Assume that it's a virus that mankind has already encountered. Then some number of people have "immunological memory" left, meaning it's highly likely that the problem can be dealt with. That is, some may die, but not all of humanity.

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  • Homo Sapiens

    Angiography of a yo-yo athlete's left arm Uh, yeah, there are a few of those, as well. The photo clearly depicts decreased blood flow in the index finger due to constant yo-yo string activity.