1. Your stomach releases corrosive acid, which is used in the metallurgical industry. It is able to melt the metal in a matter of minutes. However, why then does our stomach not melt? Its walls are covered with a special film - a unique material. But when performing surgical operations on the stomach, doctors are extremely cautious. One drop of gastric juice can corrode both the nearby tissues and the hands of the surgeon himself.
2. The position of the body affects the memory. Memories are deeply rooted in our motor reflexes. A sharp smell or sound can cause a childhood episode, long forgotten by us. The compounds may be obvious, but also unclear. Forgot how to jump in childhood rope? Take it in your hands, jump once - the brain itself will remember all further actions. You will be surprised at how vividly the childhood memories come to life.
3. Bones do not grow constantly. From time to time, they take a break to restore the mineral balance. Bones also help to compensate for the level of calcium in the body, which is needed by the organs and muscles. The bone tissue contains phosphorus and calcium, and if they are in short supply, certain hormones cause the bones to take a break in growth. Until the corresponding extracellular calcium concentration is reached. Otherwise, you will not be able to function properly.
4. 20% of our daily intake of food goes to brain nutrition. Although the brain represents only 2% of the total body weight, it consumes 20% of oxygen and calories. Three main arteries of the brain are constantly pumping oxygen. Blockage or rupture of one of them immediately deprives the brain of nutrition and causes a stroke. So make sure that your daily calorie needs are completely satisfied for the proper functioning of the body.
5. In the body of a woman, at birth, there are 35,000 ready-made eggs. During life, only a small part (and even none at all) is fertilized, and hundreds remain unused. When women reach the age of 40-50 years, the monthly menstrual cycle, which controls hormone levels and prepares the ovaries for fertilization, ceases. Ovaries produce less estrogen, which leads to physical and emotional changes in the body. But there are eggs in it. Although, in the absence of a pregnancy prospect on the horizon, the brain can stop their development and they will die.
6. Transitional age is not just words. It is known that the brain during puberty undergoes the strongest hormonal changes necessary to stimulate growth and the organism's readiness for reproduction. But why is this period so emotional? Hormones, such as testosterone, affect the development of neurons and changes in the structure of the brain have many consequences in terms of behavior. Such little-known facts can help to better understand the behavior of adolescents.
7. During chewing, the jaw muscles close in the molar region with an effort of up to 75 kilograms, and in the incisor region - up to 25 kilograms. When chewing bread you will need an effort of 20 kilograms, while chewing roasted meat - 40 kilograms.
8. Teeth of wisdom - this is the otavism that has come to us from distant ancestors. But this flaw in the human body is always a nuisance for dentists. Once upon a time, ancient people had more teeth, which then atrophied because they did not need to chew too coarse food.
9. A man can swallow about 20 milliliters of liquid in one gulp, and a woman - only 13 milliliters. But women have the ability to swallow more often.
10. The maximum decrease in blood pressure occurs around 4-5 am. Most intensively, the lungs breathe between 15 and 17 hours. The sense of hearing, smell and taste are exacerbated between 18 and 20 hours. Hair and nail growth is accelerated between 17 and 19 hours. The brain works most effectively in the period from 10 to 12 o'clock in the afternoon. The feeling of loneliness is harder to endure between 20 and 22 hours. Skin is the most permeable for cosmetics in the period from 18 to 20 pm. The visual acuity of those who are behind the wheel, decreases as much as about 2 am. This is the main temporary information about the human body.
11. Laughter is a tool for building social bonds. Recent studies have shown that laughter is the social mimicry of the response. Listening to laughter stimulates the brain areas associated with facial facial expressions. Mimicry plays an important role in social interaction. Such reactions as sneezing, laughter, crying and yawning can be interpreted as ways of creating strong social relations in a group of individuals.
12. Our skin has four color pigments. It is yellowish white, red, yellow and black. All these four tones are mixed in different proportions and create the skin colors of all people on Earth. The color of the skin is influenced, in the main, by the degree of exposure to UV rays.
13. The appendix is necessary for man! Even doctors sometimes pose such shocking facts. For a long time it was believed that this process in our body is superfluous. Now it is proved that in this body, as in the safe, there are useful bacteria that provide the work of the stomach. As soon as troubles such as diarrhea or indigestion occur, these bacteria are colonized in the gastrointestinal tract and heal it.
14. In the morning, a person is slightly higher than in the evening. Just during sleep in a horizontal position, the space of the intervertebral discs is saturated with fresh liquid, and the muscles of the back relax. Therefore, in the morning people are centimeters and a half higher than in the evenings. During the day, the discs are again compressed, out of them the liquid leaves, and our growth again becomes smaller until the next morning.
15. The surface of the human skin contains more microorganisms than the inhabitants on the Earth.