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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.
Did you know?
The human body produces and destroys 15 million blood cells every second.
Did you know?
About 100 new prescription or over-the-counter drugs come into the U.S. market every year.
Did you know?
Blood in the urine can be a sign of a kidney stone, glomerulonephritis, or other kidney problems.
Did you know?
Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.