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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?
Medication errors are more common among seriously ill patients than with those with minor conditions.
Did you know?
In 1844, Charles Goodyear obtained the first patent for a rubber condom.
Did you know?
Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
Did you know?
There are more sensory neurons in the tongue than in any other part of the body.