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Between 1999 and 2012, American adults with high total cholesterol decreased from 18.3% to 12.9%
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The familiar sounds of your heart are made by the heart's valves as they open and close.
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Many medications that are used to treat infertility are injected subcutaneously. This is easy to do using the anterior abdomen as the site of injection but avoiding the area directly around the belly button.
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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 longest a person has survived after a heart transplant is 24 years.