An average heart beats 100,000 times a day, pumping some 2,000 gallons of blood through its chambers. Over a 70-year life span, that adds up to more than 2.5 billion heartbeats.
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The average sperm cell swims at 8 inches per hour.
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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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Cracking your knuckles does not actually hurt your bones or cause arthritis. The sound you hear is just gas bubbles bursting.
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Women have about four times as many foot problems as men; lifelong patterns of wearing high heels often are the culprit.
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Our Right Lungs takes more air than our left lung.
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Enamel is hardest substance in the human body.
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