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People about to have surgery must tell their health care providers about all supplements they take.
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Intradermal injections are somewhat difficult to correctly administer because the skin layers are so thin that it is easy to accidentally punch through to the deeper subcutaneous layer.
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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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The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.
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There are 60,000 miles of blood vessels in every adult human.