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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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Human neurons are so small that they require a microscope in order to be seen. However, some neurons can be up to 3 feet long, such as those that extend from the spinal cord to the toes.
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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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Thyroid conditions cause a higher risk of fibromyalgia and chronic fatigue syndrome.
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Stroke kills people from all ethnic backgrounds, but the people at highest risk for fatal strokes are: black men, black women, Asian men, white men, and white women.