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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 150,000 Americans killed by cardiovascular disease are younger than the age of 65 years.
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The most common treatment options for addiction include psychotherapy, support groups, and individual counseling.
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If you could remove all of your skin, it would weigh up to 5 pounds.
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The first-known contraceptive was crocodile dung, used in Egypt in 2000 BC. Condoms were also reportedly used, made of animal bladders or intestines.