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Did you know?
There are 60,000 miles of blood vessels in every adult human.
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There are 20 feet of blood vessels in each square inch of human skin.
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Everyone has one nostril that is larger than the other.
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Cyanide works by making the human body unable to use oxygen.
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Throughout history, plants containing cardiac steroids have been used as heart drugs and as poisons (e.g., in arrows used in combat), emetics, and diuretics.