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There are actually 60 minerals, 16 vitamins, 12 essential amino acids, and three essential fatty acids that your body needs every day.
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The lipid bilayer is made of phospholipids. They are arranged in a double layer because one of their ends is attracted to water while the other is repelled by water.
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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.
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Vaccines prevent between 2.5 and 4 million deaths every year.
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The first oncogene was discovered in 1970 and was termed SRC (pronounced "SARK").