The adult human brain weighs about 3 pounds (1,300-1,400 g).
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When you take a step, you are using up to 200 muscles.
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Every year your body replaces 98% of your atoms.
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It would take about 1,200,000 mosquitoes to fully drain the average human body of blood.
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Your body is creating and killing about 2.4 million red blood cells per second.
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The largest cell in the human body is the female egg and the smallest is the male sperm.
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After age 30, the brain begins to lose about 50,000 neurons per day - shrinking the brain .25% each year.
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The average sperm cell swims at 8 inches per hour.
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