Scar tissue doesn't contain hair follicles or sweat glands, making scarred skin permanently different from surrounding tissue.
Fact #4613
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More Human Body Facts
Your genetic code is a unique combination among billions of humans.
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The human eye can distinguish about 10 million different colors.
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Your stomach gets a new lining every three to four days because the acid would otherwise digest itself.
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The human body can survive about 3 days without water.
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Your small intestine is about 20 feet long — about four times your height.
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The human brain weighs about three pounds on average.
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There are more bacteria in your body than human cells.
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The heart can sometimes restart after stopping.
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