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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.
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Adult head lice are gray, about ? inch long, and often have a tiny dot on their backs. A female can lay between 50 and 150 eggs within the several weeks that she is alive. They feed on human blood.
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Your chance of developing a kidney stone is 1 in 10. In recent years, approximately 3.7 million people in the United States were diagnosed with a kidney disease.
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Blood in the urine can be a sign of a kidney stone, glomerulonephritis, or other kidney problems.
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There are more bacteria in your mouth than there are people in the world.