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Did you know?
The familiar sounds of your heart are made by the heart's valves as they open and close.
Did you know?
About 100 new prescription or over-the-counter drugs come into the U.S. market every year.
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The average office desk has 400 times more bacteria on it than a toilet.
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The heart is located in the center of the chest, with part of it tipped slightly so that it taps against the left side of the chest.
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There are approximately 3 million unintended pregnancies in the United States each year.