human body is one seriously complex and mysterious mechanism that sometimes confuses even the most qualified specialists
Here are 20 out of the many unknown facts about your body:

5. Saliva: During your lifetime, you will produce enough saliva to fill two swimming pools
6. The Eyes: Your eyes remain the same size after birth but your nose and ears never stop growing.
7.The heart: The heart beats 35 million times a year. Yes, 35 million. A year!
8. Blinking: A human spends about five years of their life blinking.
9. A human makes approximately 20,000 breaths per day.
10.The Blood: The Blood Over........
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