Amazing Facts About Human Body
1. Human lips are hundreds of times more sensitive than the tips of a person's fingers.2. 99% of the calcium contained in the human body is in one's teeth.
3. The total weight of the bacteria in the human body is 2 kg.
4. A person who smokes a pack of cigarettes a day is doing the equivalent of drinking half a cup of tar a year.
5. Your mouth produces about one litre of saliva each day.
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6. Human left lung is about 10 percent smaller than the right one.
7. The human brain contains about 100 billion nerve cells.
8. Human teeth are just as strong as shark teeth.
9. The human body contains nearly 100 trillion cells.
10. The smallest cells in a man's body are sperm cells.
11. Your brain is sometimes more active when you are asleep than when you are awake.
12. We lose 80% of our body heat from the head.
13. There are about 40,000 bacteria in the human mouth.
14. Children grow faster in the spring.
15. Scientists estimate that the nose can recognise a trillion different scents.
16. In the morning, a person is about 8 millimetres taller than in the evening.
17. It is impossible to sneeze with your eyes open.
18. The average person forgets 90% of their dreams.
19. The human brain has a memory capacity which is the equivalent of more than four terabytes on a hard drive.
20. Women's hearts beat faster than men's.
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