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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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More than 34,000 trademarked medication names and more than 10,000 generic medication names are in use in the United States.
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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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Cytomegalovirus affects nearly the same amount of newborns every year as Down syndrome.
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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.