Interesting facts about Human Body #3
1) The human heart is approximately equal in size to that of a person’s fist. An adult’s heart weights 220-260 grams. 2) At birth, there are 14 billion cells in the human brain. This number does not increase throughout a person’s lifetime. After 25 years, the number of cells falls by 100,000 every day. About 70 cells die in the minute it takes you to read a page in a book. After 40 years, the decline of the brain accelerates sharply, and after 50 years neurons (that is, nerve cells) shrink and the brain gets smaller. 3) At birth , a child’s body is made up of around 300 bones . But an adult has just 206 . 4) During a person’s lifetime, the small intestine is about 2.5 meters. After they die , the muscles in the walls of their intestine relax, and it’s length increases to 6 meters. 5)Your right lung can take in more air than your left. 6) An adult person performs around 23,000 inhalations and exhalations a day. 7) The smallest cells in a man’s body are sperm cells. 8) T...