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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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In most climates, 8 to 10 glasses of water per day is recommended for adults. The best indicator for adequate fluid intake is frequent, clear urination.
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Drying your hands with a paper towel will reduce the bacterial count on your hands by 45–60%.
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The first monoclonal antibodies were made exclusively from mouse cells. Some are now fully human, which means they are likely to be safer and may be more effective than older monoclonal antibodies.
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When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.