10 strange facts about the human body

1. Your mouth produces about one liter of saliva every day!
2. Sometimes your brain is more active when you are asleep than when you are awake.

3. Put end to end, adult blood vessels can rotate around the Earth's equator four times!
4. The word “muscle” comes from the Latin term meaning “little mouse”, which the ancient Romans believed to resemble the biceps muscles.

5. Objects give off a tiny amount of light that is too weak for the eye to see.
6. The average person has 67 different types of bacteria in their belly button.
7. You lose about 4 kg of skin cells every year!
8. Babies don't shed tears until they are at least one month old.

9. Zoom information along the nerves at about 400 km/h!
10. The human heart beats more than three billion times in an average lifetime.