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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 average office desk has 400 times more bacteria on it than a toilet.
Did you know?
The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
Did you know?
Patients who cannot swallow may receive nutrition via a parenteral route—usually, a catheter is inserted through the chest into a large vein going into the heart.
Did you know?
About 100 new prescription or over-the-counter drugs come into the U.S. market every year.