Homo Sapiens. Страница 13
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Homo Sapiens
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Homo Sapiens
Another interesting fact about our hearing This time related to the brain. Two parts of our auditory analyzer do not stop during sleep - we hear even when we are asleep! The auditory receptor and the auditory nerve with conduction pathways do not stop working. But the areas of the cerebral cortex that analyze this information are asleep and ignored. However, you may have noticed one interesting feature. Since part of the auditory analyzer is not "asleep", external sounds can interfere with our dreams, changing the plot a little🧠 -
Homo Sapiens
Sound is incredibly dangerous to our body Like, in fact, everything in this world, if you overdo it... Above 65dB, the volume of sound greatly increases your heart rate and breathing - you can roughly compare it to loud speech. Above 90 dB, it reduces hearing sensitivity and can provoke headaches, nausea and dizziness. Such loudness can be compared to a passing train. Over 100 dB, it can already damage the hearing aid - it can be compared to the noise of a nightclub or a helicopter taking off. More than 130 dB will cause concussion and trauma to the hearing aid - the sound of a rocket launch or a gun shot near the muzzle of the barrel. More than 160 dB is almost guaranteed to cause ruptured eardrums and respiratory trauma. Louder frequencies are already used in specific weapons... -
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Homo Sapiens
Sleeve gastroplasty - another method of combating obesity And this time, quite effective and even time-tested. Sleeve gastroplasty is used since 2003, and, according to statistics, it allows to beat obesity for 80% of cases! It is indicated for patients with the morbid stage of obesity, that is - a life-threatening stage. Sources are also emerging evidence of a pronounced anti-diabetic effect of sleeve gastroplasty in respect of diabetes mellitus. However, the biggest disadvantage of sleeve gastroplasty is its irreversibility. The "normal" stomach will never come back🙌🏻 -
Homo Sapiens
That’s why a drug treatment for acne is more effective. Various drugs affect the cause of the problem and not just try to eliminate the consequences. If we talk about the effect of drugs specifically: - They kill the bacteria on the surface that cause the inflammatory reaction. - Reduce the volume of secret production by the sebaceous glands. - They get rid of accumulated pieces of dead skin in the pore and slow down the deadening itself. - Stimulate the growth of new epithelial cells and "dry out" the skin. And the methods most people use simply remove the result - the pustule itself🙌🏻 Naturally, this doesn’t help a person much, and can even harm them. -
Homo Sapiens
The adventures of a drug inside a person Before a drug can be clinically effective, it must be absorbed, or more simply put, it must be absorbed into the bloodstream. The chemical composition of the drug, as well as the environment in which it is placed, work together to determine the speed and degree of absorption of the drug. This determines the timing of the drug's onset of action and, in part, the severity of its effect. And absorption is only the first "step of the journey." The medication goes through three more phases inside the body - distribution, metabolism and excretion. -
Homo Sapiens
Unobvious harm from too much smartphone use Stress on the spine! An adult's head weighs about 4.5-5.5 kilograms, which is quite a lot for our neck. However, as the tilt increases, the force acting on the spine increases. For example, if the tilt reaches 15 degrees, it weighs the head down to 12 kilograms. And if the head is bent to 45 degrees, the neck will be influenced by 22 kilograms. This kind of head position gradually causes chronic tension and pain in the neck. What happens has already got its name - text-neck (neck - "neck"). Prolonged deep inclination of the head, unusual for our organism, gradually leads to the premature erasure of vertebrae, the damage of cervical muscles, increases the risk of migraine and arthrosis in the upper part of the spine. So, try to hold the phone at the lowest possible angle, that is - closer to eye level👌🏻 -
Homo Sapiens
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Homo Sapiens
Information exchange between cells - how does this process happen? Like all elements in our body - thanks to signals of one kind or another. Cells exchange information with their closest neighbors through gap junctions. These are structures that directly connect cell cytoplasm. Such "conversations" play an important role in many processes, from synchronization ...from the synchronization of heart muscle contractions to the ability to perceive sound. -
Homo Sapiens
How fast do bacteria multiply in our body? It's an interesting question that can't be answered in one word - as usual😁 However, we can draw legitimate conclusions from other data! For instance, we do know that when we create the most favorable conditions for bacteria to grow, then the fission process occurs every 20-30 min. If bacteria in natural conditions were able to multiply at such a rate, then after 24 hours the total mass of offspring of one bacterium would amount to 1,800,000 kg. Naturally, the conditions inside our bodies are far from ideal. The "good" bacteria are in strictly regulated symbiosis with the body, and the "bad" bacteria face a fierce fight from the immune system. However, there is a condition, in which the growth of "good" bacteria gets out of control: bacterial overgrowth syndrome. Although it is often listed as a type of dysbacteriosis, the pathology is in some ways unique. In it, the small intestine contains more than one million bacteria per 1 ml of contents. -
Homo Sapiens
Take a virtual walk through the airways! Consistently walked through the oral cavity, pharynx, epiglottis, trachea, and... And got to the "observation point" of the entire bronchial tree👌🏻 -
Homo Sapiens
What is the chance that a person will get cancer? Is it possible to calculate a specific "universal" chance🤔 Well, we haven't found such data... However, the risk of developing specific cancers is public information. So, sharing it with you! The risk of developing cancer in women is 38.7%. That is, every third (almost every second) woman faces it as a result! And speaking about specific pathologies, every 8th woman will get breast cancer, and every 17th woman will get lung cancer. That's a scary statistic... But with men, as is often the case with medical statistics, things are a little worse. Forty percent of the stronger sex encounters cancer in their lifetime. And if we talk about specific examples again, one in 9 is battling prostate cancer and one in 15 is battling lung cancer. After this kind of information, you realize that you have to be extremely careful with your health! -
Homo Sapiens
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Homo Sapiens
Nerve cells cannot regenerate Ever heard such a thesis? Well, people, who haven't studied this question completely, often use it - we don't do that😅 Yeah, the brain or spinal cord, once it has lost a cell, cannot recreate it anymore. Although there are studies aimed at proving otherwise. They study in depth the process of how people recover from strokes or regain sensation after spinal cord injuries. So, duh - the point is debatable. However, the nerve endings in the thickness of the skin are much more unequivocal. They are capable of recovery. After all, damage to the skin usually is not deep in its layers, and only the nerve fiber branches are damaged. And if the cell itself remains unharmed, it just needs to let in new branches👌🏻 -
Homo Sapiens
Why is carbon monoxide poisoning dangerous? It has no taste, odor, color, but it is very toxic to the body! Such poisonings mostly occur in case of malfunctioning furnace heating or fires inside closed rooms. Once in the body, CO blocks the formation of ATP, which leads to tissue hypoxia and energy shortages. Carbon monoxide then binds with hemoglobin to form carboxyhemoglobin, which cannot carry oxygen, another cause of hypoxia. It primarily affects the organs that are sensitive to hypoxia - the brain and the heart. Therefore, CO poisoning manifests as headache, dizziness, nausea, vomiting, impaired coordination of movements. And in severe cases - loss of consciousness, coma, death. -
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Homo Sapiens
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Homo Sapiens
Strings of the human heart Literally and figuratively. I'm talking about these thin strings that stretch from the heart cavity to the valves. They are the same color as the heart itself in the picture☝🏻 The more scientific name for "strings" is chordae. When the valves open they are relaxed, and when the valves close the chords tighten. This is where the second name heart strings comes from. Like the heart "plays" its rhythmic music on them. 
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Homo Sapiens
The little cells that set up our entire digestion Pancreatic acinar cells☝🏻 They are the ones that synthesize and secrete almost all the necessary digestive enzymes involved in the lumen of the small intestine. Both synthesis and secretion are strictly regulated in both the short and long term - a very subtle and unique mechanism.