There is enough iron in a human body to make a small nail.
Fact #3951
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More Human Body Facts
The human eye adapts to darkness by increasing light sensitivity.
Fact #899 · Human Body
Stress hormones prepare the body for a fight-or-flight response.
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The human body contains trillions of cells.
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About 1 in 2,000 people are born with an extra finger or toe.
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The average human body contains enough carbon to make about 9,000 pencils.
Fact #2444 · Human Body
The human body contains enough carbon to make about 9,000 pencils.
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There are more lifeforms living in your body than human cells.
Fact #2717 · Human Body
The brain begins to suffer damage after about 5 minutes without oxygen.
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