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Did you know?
Vaccines prevent between 2.5 and 4 million deaths every year.
Did you know?
Prostaglandins were first isolated from human semen in Sweden in the 1930s. They were so named because the researcher thought that they came from the prostate gland. In fact, prostaglandins exist and are synthesized in almost every cell of the body.
Did you know?
Certain rare plants containing cyanide include apricot pits and a type of potato called cassava. Fortunately, only chronic or massive ingestion of any of these plants can lead to serious poisoning.
Did you know?
There are 20 feet of blood vessels in each square inch of human skin.
Did you know?
The familiar sounds of your heart are made by the heart's valves as they open and close.