The largest cell in the human body is the female egg and the smallest is the male sperm.
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There are times when you're walking that the pressure on your feet exceeds your body weight, and when you're running, it can be three or four times your weight.
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Coughing can cause air to move through your windpipe faster than the speed of sound - over a thousand feet per second!
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It takes about 20 seconds for a red blood cell to circle the whole body.
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The human body contains over a billion miles of DNA.
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Your heart will pump about 212 million liters in its lifetime.
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The average sperm cell swims at 8 inches per hour.
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The adult human brain weighs about 3 pounds (1,300-1,400 g).
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