nose

1. The nose produces nearly 1 liter of mucus (snot) every day, which is about 2 bottles of mineral water, most of which will be swallowed into the stomach.

2. Usually only one side of the nose can ventilate.

3. When sleeping, the nose won't sneeze.

You sneeze faster than a sports car, and the speed can reach 100 kilometers per hour.

5. Some people hate coriander, which may be "destiny takes a hand". Coriander contains a kind of "bug; Aldehyde has a taste, and people who hate coriander are more sensitive to aldehyde in their genes.

mouth

6 A person can secrete about 1 liter of saliva every day (about 2 bottles of cola), so it is not unreasonable to say that "one spit will drown you, and a bathtub will be filled in about three years (1 cubic meter)".

There are more bacteria in the mouth than the population on the earth. And a kiss of 10 second will make you exchange 80 million bacteria.

8 Always biting your tongue, not wanting to eat meat, maybe you just need to go to the stomatology department to see the problem of tooth occlusion.

9. There are only five basic flavors that the tongue can distinguish: sour, sweet, bitter, salty and fresh. Spicy is a kind of pain, not a taste!

10. There is no taste map, and there is no Chu-Han River boundary where the tongue senses taste. Taste buds that perceive each taste are randomly distributed on the surface of the tongue. Next time someone drinks in front of you like this, you can ignore it.

hair

1 1. The hair follicles on your scalp are 85% in the growth period, 14% in the rest period and 1% in the regression period: a hair can usually accompany you for 2 to 4 years, and the longest can reach 6 years.

12 people usually have about 65438+ 10,000 hairs, and it is normal to lose 100 hairs a day!

13. The common principle of hair transplant surgery is "robbing Peter to pay Paul", and the hair follicle in the hair-dense part (pillow) is transplanted to the hair loss place, but no new hair is actually implanted.

eye

14. The eyes (eyeballs) stopped growing a few years after you were born. After all these years, your face is getting bigger and bigger ... that's why your eyes looked bigger when you were a child.

15. Will eye drops make your throat bitter? Because the eyes and the nasal cavity are connected, so are the mouth and the nasal cavity.

16. Also, because there is a nasolacrimal duct between the inner corner of the eye and the nasal cavity, all the tears are coming out of the nose.

17 Old people have big ears because they don't stop growing.

18 The small hole in the ear is a preauricular fistula, which is a common congenital malformation of the external ear, and there is no symptom and no need for treatment. The incidence of congenital preauricular fistula in China is 12%. If you have it, you are one in a million!

19. The ear is an organ that cannot be suspended. If you sleep with headphones on, your ears will still be stimulated and your hearing will be damaged.

There are two special structures in 20 people's ears, called "inner ear vestibule" and "semicircular canal", which are responsible for feeling posture and adjusting balance. Motion sickness is related to these two structures.

Hands and feet (limbs)

2 1 fingernails will grow faster than toenails.

22. The newly grown nails are white, and then they will gradually become transparent. The whiter "crescent" is actually a newer nail; Generally speaking, the crescent size and number of fingernails are constant and have nothing to do with health.

23. The palms and soles of the feet are the places where sweat glands are most densely distributed. There are about 250 thousand sweat glands on people's feet, and about 023 liters of sweat can be excreted every day.

24. Sedentary is not conducive to the health of the spine.

other

25. The held fart will not disappear. The fart that can't break the door will be absorbed by the intestine, enter the blood, transfer to the whole body with the blood, then reach the liver, then enter the lungs, and finally, be exhaled by you with your breath!

Men may also get breast cancer because there is breast tissue in men's breasts.

The body fat rate of normal men is about 15%, and that of women is about 25%, while that of pigs is usually 14~ 18%, which means that most people are actually fatter than pigs.

Affected by bones and gravity, people are taller in the morning than at night. The main reason is that the process of lying flat stretches the spine of the body. Try to get some sleep before the next height measurement.

29. When a normal person is on an empty stomach, the capacity of the stomach is about 50 ml; When eating, the stomach wall will relax, up to 1.5 liter; Dieting won't starve your stomach.

The digestive system of 30 people is about 8 meters from the mouth to the rectum; The food we eat usually stays in the stomach for 6 hours, then passes through the small intestine, colon and finally reaches the rectum to become feces. This process takes about 16~24 hours.