Cyanide works by making the human body unable to use oxygen.
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It is widely believed that giving a daily oral dose of aspirin to heart attack patients improves their chances of survival because the aspirin blocks the formation of new blood clots.
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Human kidneys will clean about 1 million gallons of blood in an average lifetime.
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Pope Sylvester II tried to introduce Arabic numbers into Europe between the years 999 and 1003, but their use did not catch on for a few more centuries, and Roman numerals continued to be the primary number system.
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There are 20 feet of blood vessels in each square inch of human skin.
Muscle Contraction
Cricothyroid muscle
Testing the strength of the sternocleidomastoid muscle against resistance