10 facts about human body

Here's a top list of some humand body facts:

1 - Of the 206 bones in the human body, 1/4 are located in the feet.

2 - The human heart has to pump blood back and forth through the 70,000 miles of blood vessels in the body once every minute.

3 - The stomach has 35 million digestive glands.

4 - Human hair is almost indestructible. It cannot be destroyed by cold, climactic changes, water or other natural forces (except fire). It also can survive exposure to many kinds of acids and corrosive chemicals.

5 -There are 45 miles of nerves in the human body.

6 - It is impossible for a person to keep their eyes open while sneezing.

7 - Human eyes are capable of seeing more than 1 million simultaneous visual impressions and can distinguish between almost 8 million gradations of color.

8 - The amount of pigment melanin in a person’s skin determines what color their skin will be. People with very little melanin have light colored skin, while people with large amounts of melanin have skin that is dark in color.

9 - The human body consists of nine systems: the skeletal system  the muscular system, the nervous system, the hormonal system, the circulatory system, the digestive system, the respiratory system, the immune system and the reproductive system.

10 - The human body has 10 trillion cells living within it.