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Did you know?
Cocaine was isolated in 1860 and first used as a local anesthetic in 1884. Its first clinical use was by Sigmund Freud to wean a patient from morphine addiction. The fictional character Sherlock Holmes was supposed to be addicted to cocaine by injection.
Did you know?
The familiar sounds of your heart are made by the heart's valves as they open and close.
Did you know?
There are more sensory neurons in the tongue than in any other part of the body.
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On average, the stomach produces 2 L of hydrochloric acid per day.
Did you know?
The most destructive flu epidemic of all times in recorded history occurred in 1918, with approximately 20 million deaths worldwide.