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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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The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.
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Nitroglycerin is used to alleviate various heart-related conditions, and it is also the chief component of dynamite (but mixed in a solid clay base to stabilize it).
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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.