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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.
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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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Asthma occurs in one in 11 children and in one in 12 adults. African Americans and Latinos have a higher risk for developing asthma than other groups.
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The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.