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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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Blood is approximately twice as thick as water because of the cells and other components found in it.
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As many as 20% of Americans have been infected by the fungus known as Histoplasmosis. While most people are asymptomatic or only have slight symptoms, infection can progress to a rapid and potentially fatal superinfection.
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It is difficult to obtain enough calcium without consuming milk or other dairy foods.
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Children of people with alcoholism are more inclined to drink alcohol or use hard drugs. In fact, they are 400 times more likely to use hard drugs than those who do not have a family history of alcohol addiction.