Amazing Facts About Human Body ::

1. The human has 70,000 miles of blood vessels.
2. Human teeth are almost as hard as rocks.
3. The stomach of an adult can hold 1.5 liters of material.
4. There are 400 species of bacteria in the human colon.
5. There are more than 640 muscles in human body.
6. On average, a person has two million sweat glands.
7. The surface of the human skin is 6.5 square feet (2m).
8. The brain has no sensation of pain, even when it is cut.
9. Our eyes never grow, our nose and ears never stop growing.
10. The sneez can exceed the speed of 100 mph.
11. It requires the use of 72 muscles to speak a single word.
12. A kiss for one minute can burn 26 calories. wink emoticon
13. A blink of an eye lasts about one-tenth of a second.
14. A man's beard contains between 7,000 and 15,000 hairs.
15. The average human blinks their eyes 6,205,000 times each year.
16. There are 1,200,000 fibers in a human optic nerve.
17. You can't kill yourself by holding your breath.
18. The life span of a taste bud is 10 days.
19. In a lifetime, an average human produces 10,000 gallons of saliva.
20. The kidneys filter over 400 gallons of blood each day.