A voyage through the systems of the human body: Quick Facts

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Scene from Fantastic Voyage (1966) showing a miniaturized submarine and crew floating inside a stylized, red-lit depiction of the human body.

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human body Why do humans need water?What Factors Determine Height?How many pints of blood does a human have?human nervous system human eye human digestive system human respiratory system renal system human cardiovascular system human endocrine system