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The familiar sounds of your heart are made by the heart's valves as they open and close.
More than 4.4billion prescriptions were dispensed within the United States in 2016.
The U.S. Preventive Services Task Force recommends that all women age 65 years of age or older should be screened with bone densitometry.
More than 2,500 barbiturates have been synthesized. At the height of their popularity, about 50 were marketed for human use.
If you could remove all of your skin, it would weigh up to 5 pounds.
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