The largest cell in the human body is the female egg and the smallest is the male sperm.
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The average sperm cell swims at 8 inches per hour.
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Your heart will pump about 212 million liters in its lifetime.
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The human brain doesn't stop developing until about 25 years old.
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Every year your body replaces 98% of your atoms.
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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.
102
When you get goosebumps and your hair stands, the hair helps to trap air, making you feel warmer by keeping in your body heat.
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