2. The human body has more than 600 muscles: only 17 muscles are needed for smiling, and 24 muscles are needed for frowning.
The most powerful muscle of human body is tongue.
People's hearing will get worse if they eat too much.
Fingernails grow four times faster than toenails. Thumb nails grow slowest and middle finger nails grow fastest.
Your stomach has to grow a new layer of mucus every two weeks, otherwise it will digest itself.
7. Adults produce about one liter of saliva every day on average, depending on how much food you eat.
8. Human embryos have fingerprints when they are three months old.
9. Children have more bones than adults 100. This is because some bones fuse during development.
10. You can't keep your eyes open when sneezing.
1 1, the length of blood vessels can circle the earth twice.
12. It only takes 20 seconds for blood to circulate in the human body. If a person lives to 80 years old, blood will circulate in the body 1, 26 14400 times.
13, the shaved hair in a person's life is nine to ten meters long.
14. Sleeping consumes more calories than sitting and watching TV.
15, people will die if they don't sleep for about 10 days.
16. If the moon is just above your head, you will be thinner.
17, influenced by gravity, you are about 2 cm taller in the morning than at night.
18, sneezing too hard may break the ribs, and holding it may rupture the blood vessels in the brain or neck.
19, the function of the ass is to maintain the stability when we run.
20. Urine is very beautiful and colorful under the microscope.
2 1. In normal posture, the circumference of two fists is the circumference of the neck.
22. Your body includes about 7x atoms (7 followed by 27 zeros).
There are more bacteria in the mouth than the population on the earth. The total weight of these bacteria is about 3.6 kg. Of course, bacteria are also divided into beneficial bacteria and harmful bacteria. Without bacteria, human beings can't live.
24. Your brain has about 2.5 million gigabytes of storage space, so you don't have to worry about your brain being stuffed.
25. You will produce about 300,000 to 600,000 dead skin particles a day, which means that a lot of dust in your home falls from you.
26. The iron in your body can make a nail grow nearly 4 cm.
27. People can't lick their elbows. 90% people will try to lick their elbows after reading this article.
If you can't get it, please consciously like it! )