Your mouth produces about one litre of saliva each day!

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Your brain is sometimes more active when you’re asleep than when you’re awake

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The human heart beats more than three billion times in an average lifespan.

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Your left lung is about 10 percent smaller than your right one. 

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Your blood makes up about eight percent of your body weight.

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Information zooms along nerves at about 400kmph!

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