21 interesting facts about the human body not everyone knows
Here are 21 surprising but extremely interesting facts about the human body you may not know yet. Will you know about all this? Invite you to consult!
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It seems that all of us also think that we fully understand our bodies. We know how the body works, what changes and processes are taking place in the body. In fact, the human body is an extremely complex and mysterious mechanism of action, sometimes even confusing experts such as doctors and scientists.
On the Bright Side page has found 21 surprising but extremely interesting facts about the human body you may not know . Will you know about all this? Invite you to consult!
1. Tongue is unique, remember this before letting someone know it.
2. A strand of hair can withstand the weight of an apple. However, scientists do not specify the specific size of the apple.
3. The number of bacteria in a person's mouth is equal to the total number of people living on Earth, even more.
4. Soft, brittle nails and no nail sores may be a sign of excessive thyroid function.
5. The speed of a nerve impulse to the brain is about 400km / hour.
6. Not only 4 different blood groups as we often think, there are actually 29 types! The rarest blood of these is Bombay blood group and this blood type is only common in a small group of families in Japan.
7. In one day, our blood " ran " for a long distance of 19,312km.
8. The total length of all nerves in the human body is 75km.
9. Each of us breathes about 20,000 times a day.
10. Most people in the world have special bugs on eyelashes - called demodex .
11. Human eyes can distinguish 10 million different colors, but our brains cannot remember them all.
12. Our ears continue to grow throughout life with an almost unbelievable speed - 1/4 mm per year!
13. The heart beats about 35 million times in a year.
14. Everyday, the human body loses about 1 million skin cells - the volume of up to 2kg per year.
15. A square centimeter of skin contains about 100 pain sensors.
16. Men have less taste buds on their tongue than women.
17. On average, each person consumes about 35 tons of food throughout his life.
18. A person spends about 5 years of his life blinking. Fortunately, we can do many other things at the same time!
19. There are 100,000 chemical reactions that occur every second in our brain.
20. Human sneezing breath speed is 160 km / h.
21. To smile, people need to exercise 17 muscles, while crying requires 43 muscles. So laugh a lot!
See also: Try to see what the world looks like in the eyes of color-blind people
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