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Did you know?
Oliver Wendell Holmes is credited with introducing the words "anesthesia" and "anesthetic" into the English language in 1846.
Did you know?
There are 20 feet of blood vessels in each square inch of human skin.
Did you know?
Hippocrates noted that blood separates into four differently colored liquids when removed from the body and examined: a pure red liquid mixed with white liquid material with a yellow-colored froth at the top and a black substance that settles underneath; he named these the four humors (for blood, phlegm, yellow bile, and black bile).
Did you know?
Illicit drug use costs the United States approximately $181 billion every year.
Did you know?
In 1844, Charles Goodyear obtained the first patent for a rubber condom.