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Did you know?
The human body produces and destroys 15 million blood cells every second.
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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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Fewer than 10% of babies are born on their exact due dates, 50% are born within 1 week of the due date, and 90% are born within 2 weeks of the date.
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People with high total cholesterol have about two times the risk for heart disease as people with ideal levels.
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There are 20 feet of blood vessels in each square inch of human skin.