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Did you know?
Your heart beats over 36 million times a year.
Did you know?
There are 20 feet of blood vessels in each square inch of human skin.
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The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.
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Nitroglycerin is used to alleviate various heart-related conditions, and it is also the chief component of dynamite (but mixed in a solid clay base to stabilize it).
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The human body produces and destroys 15 million blood cells every second.