10 body facts to amaze you

Here are this week’s 10 body facts – be prepared to be wowed:

1. A passionate kiss causes the same chemical reactions in the brain that skydiving and firing a gun do.

2. The strongest muscle in the human body is the tongue.

3. The human heart is approximately equal in size to that of a person’s fist. An adult’s heart weights 220-260 grams.

4. 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.

5. At birth, a child’s body is made up of around 300 bones. But an adult has just 206.


6. During a person’s lifetime, the small intestine is about 2.5 metres. After they die, the muscles in the walls of their intestine relax, and it’s length increases to 6 metres.

7. Your right lung can take in more air than your left.

8. An adult person performs around 23,000 inhalations and exhalations a day.

9. The smallest cells in a man’s body are sperm cells.

10. There are about 40,000 bacteria in the human mouth.


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Holly Konig

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