Man is the most amazing creature created by nature! How many discoveries have been made in the field of human physiology, and how much is still unknown and inexplicable in this small universe - our body. Some interesting facts about people below will help the reader learn something new.
Brain
The least studied human organ is the brain. And although scientists have managed to unravel many of the mysteries of this incredibly complex organ, more and more information about its functions and capabilities is emerging. Therefore, let's look at some interesting facts about people, starting with him.
Did you know that the brain requires the same amount of energy that a ten-watt light bulb consumes? It turns out that it is not in vain that in cartoons a flashing light bulb is depicted above a person’s head when a smart thought arises in the hero’s head. This association has the right to life, because it is not far from the truth. The brain even in a dream generates as much energy as a smalllight bulb.
Oddly enough, the brain is most active at night, not during the day. It would be logical to assume that “lying” in bed at night will require much less energy than the numerous complex manipulations that a person performs during working hours. But scientists have found out the opposite - it turns out that when a person "turns off", his brain "turns on". And although there is no scientific explanation for this yet, we should thank this "hardworking" body for its hard work during sleep, especially since it gives us pleasant visions.
Blood
No less fascinating are interesting facts about human blood. Back in 1971, 25-year-old observations of Dr. Rachel Naomi were published, in which she claims that a lot depends on the blood type - behavior, character, manners and feelings of a person. Moreover, women with gr. B blood live much longer than women with gr. 0 blood. And men with group B, on the contrary, live less than those with group 0. Unfortunately, this statistic has no scientific explanation yet.
Did you know that if all the blood vessels of an adult are stretched in a straight line, you get a vessel with a length of more than 95,000 kilometers! And it was also calculated: 1,120,000 mosquitoes can suck all the blood out of a person!
The heart, pushing blood throughout the body, creates such pressure that it can explode with a powerful jet more than 9 meters.
In 1 second, they manage to rush through the human circulatory system25 billion cells.
It turns out that human blood has the same density as sea water, but it is much denser than fresh water. And in 1 second, the bone marrow gives birth to 3 million blood cells, but in 1 second it destroys exactly the same number.
Intestines
And here are other interesting facts about human organs. The largest internal organ is the small intestine. It turns out that if you compare the length of the small intestine with the height of an average adult, then it will be four times longer.
The acid that is in the stomach to digest food is so aggressive and strong that it can dissolve a razor! Of course, you do not need to check these data on your stomach, but ordinary hydrochloric acid, similar to gastric acid in some parameters, easily dissolves many types of metals.
Light
It turns out that the right lung is larger than the left, and you know why? It's simple - the heart is on the left, and the left lung is forced to "make room" for it.
It is customary to draw the same parts of the lungs in the pictures, although in reality they are slightly different. The human heart is located quite centrally, but slightly tilted to the left side, as if displacing part of the lung.
Leather
It's hard not to mention such an external organ as human skin. Interesting facts testify to its amazing capabilities. This largest body organ in terms of area is about 2 m2, and weighs 2-4 kilograms.
Distributed in the skin: 500,000touch receptors, 1 million pain endings and 3 million sweat glands. Every minute she passes 460 ml of blood through herself. There are six million cells for every square centimeter of skin.
For the entire life of the "owner" it is updated about a thousand times. Full renewal of adult cells occurs in 26-30 days, and in infants - in 3 days.
The sweat glands in the skin regulate body temperature. If the total number of them is from 2 to 5 million, then most of them are on the feet and palms - about 400 glands per 1 cm2. The third place is occupied by the forehead, where there are 300 glands per 1 cm2. Almost a liter of sweat is released per day, and some people even more. Africans and Europeans sweat more than Asians because they have more sweat glands.
The sebaceous glands are so active that they can secrete about 20 grams of sebum per day. What is it for? This is necessary for the implementation of the main function of the skin - protective. The produced fat, mixed with sweat, forms a protective film that protects against bacterial and fungal attacks from the outside.
The thinnest and most delicate skin covers the eyelids, and the thickest is on the soles of the feet, where its thickness reaches half a millimeter.
Everyone has noticed that after a long stay in the water, the skin becomes wrinkled. So this is no coincidence. To prevent wet fingers from slipping, nature provided for making such peculiar temporary “protectors”.
In 1901, a dermatologistAlfred Blaschko made the discovery that human skin is divided into invisible stripes that appear only in certain diseases.
Eyes
And how are your eyesight, and how many interesting facts about human eyes do you know?
Most newborn babies have grey-blue eyes because the pigment in the iris is formed by the first year. Interestingly, the color and width of the pupil change throughout life. Pupils are narrow in infants and the elderly.
Other interesting facts about people say that a he althy person's pupil is always black. In old age (with thickening of the lens and the development of cataracts), it becomes cloudy.
Try looking around the room quickly and notice how many different distances you focus on at the same time. The lens of the eye abruptly changes focus even before a person has time to realize it. You can compare this fact with the action of a photographic lens, which spends several seconds focusing from one distance to another. So, the eye lens is much faster than a camera lens. If he didn't have such an amazing ability, then the surrounding objects would go out of focus and into it all the time.
A person blinks approximately 15,000 times a day. This function is semi-reflex, that is, it occurs automatically, although if necessary, a person can not blink for a long time.
This function helps to remove motes from the surface of the eyeball and "refresh" with a clean tear, which oxygenates the eyes and hasantibacterial property.
It turns out that when the eyes begin to dry, they release water. In fact, a tear consists of several substances: water, fat, mucus, which must be in strict proportions. If the correspondence is disturbed, the eyes may dry out, in which case, on command of the brain, a tear is released.
What do other interesting facts about people say? The English chemist John D alton did not distinguish red. When the gardener brought him a bouquet of red roses to paint still lifes, the scientist depicted blue flowers. This is where the original expression "D alton's blue roses" comes from. John described his condition from a scientific point of view, and later the disease was called "color blindness".
Heart
Many interesting facts are known about the human heart as the most important organ on which life itself depends. So, for example, in one Mexican prison, a criminal was awaiting the execution of a death sentence. His last wish was permission to watch the World Cup. In one match, his favorite team lost, and the heartbroken criminal suddenly died of a heart attack. And it happens.
In a person's lifetime, the heart beats approximately 3 billion times. The beat of the heart is the moment the valves close.
Egyptian papyri symbolically depicted the human heart as an ibis hiding its head under its wing. And in ancient Rome, it was believed that the ring finger of the hand is associated with this organ. By the way, this is where the tradition of putting wedding rings on this finger came from.
If for 45 years at maximum pressure notturn off the faucet, the volume of water that flows out will be equal to that which the heart pumps over a lifetime.
Sense Organs
Organs of smell, touch, taste, sight, hearing - all these are human sense organs. Interesting facts about them are so diverse and numerous that it is impossible to tell about all of them. We will describe only a few that not everyone has heard of.
Touch receptors are located not only in the skin, but also in some muscle groups, joints and even on the mucous membranes. If you lightly touch the hands, the human heart will begin to beat more slowly and drop a little blood pressure.
As a result of the experiment, scientists made an interesting observation. A group of 40 premature babies was divided in half. In the first group, children were gently stroked every day for one hour, but the babies in the second group were not. After 10 days, all the children were weighed, and it turned out that with the same nutrition, those children who were caressed gained 47% more weight than those who were not touched.
By the way, do not be surprised if you hear that a person recognizes the taste of food not only in the mouth. It turns out that there are 5 million olfactory receptors in the nose, which contribute to the identification of about ten thousand different odors and at the same time affect the recognition of food. Scientists have found that taste sensations are more than half the result of the influence of olfactory receptors.
Nails
What other interesting facts about people can you remember? Well, toFor example, did you know that the fastest growing nail is on the middle finger? It is noticed that on the middle finger of the dominant hand (you are right-handed or left-handed), it grows fastest. Scientists have not yet figured out why this happens. But it can be assumed that the growth rate of the nail is somehow related to the length of the finger. Based on this, we can conclude that the nail of the longest finger should grow faster than the others, and the shortest finger should grow more slowly.
About the person
Man is the most interesting organism on earth, which will be studied for many more centuries, each time revealing new and new details about all of humanity and about specific individuals in particular. For sure, interesting facts about Russian people specifically will be noticed. In the meantime, we keep statistics of general discoveries and observations about the human body.
In conclusion, I would like to surprise you with something special. By the way, have you ever wondered what would happen if most of the internal organs were removed from the body? Think death? But they didn't guess! At first glance, the human body is so fragile. A person will live if his spleen, stomach, one kidney, 75 percent of the liver, one lung, 80 percent of the intestines and almost every organ located in the inguinal and pelvic regions are removed! Of course, after this, a person will no longer be able to feel as big as before, but without all the listed organs, he will not die. Here is such a mystery - a man!
