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Mouth produces about one liter if saliva each day
Human brain is sometimes more active while asleep than when awake.
Laid end to end an adult’s blood vessel could circle Earth’s equator four times.
Body emits a very tiny amount of light nearly impossible for eyes to see.
A person loses an average of 4 kg of skin cells every year.
Babies don’t shed tears until they are at least a month old.
Human left lung are nearly 10 percent smaller than the right one.
Human teeth is as strong as shark teeth
Scientists claim that the nose can recognize a trillion different scents.
Human blood makes up to 80% of the body weight
Humans are the only species known to blush.