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Did you know?
There are 20 feet of blood vessels in each square inch of human skin.
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Blood is approximately twice as thick as water because of the cells and other components found in it.
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The B-complex vitamins and vitamin C are not stored in the body and must be replaced each day.
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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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In the ancient and medieval periods, dysentery killed about ? of all babies before they reach 12 months of age. The disease was transferred through contaminated drinking water, because there was no way to adequately dispose of sewage, which contaminated the water.