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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.

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The first war in which wide-scale use of anesthetics occurred was the Civil War, and 80% of all wounds were in the extremities.

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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.

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In 1844, Charles Goodyear obtained the first patent for a rubber condom.

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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.

The frequency of competition according to the number of species involved. The frequency of competition according to the number of species involved.
(c) snow in Nunavut, alter the local albedo, causing altered microclimates. High albedos are found (c) snow in Nunavut, alter the local albedo, causing altered microclimates. High albedos are found
(a) With few ticks, moose retain a brown coat; (b) at high numbers of ticks, moose self-groom, destr (a) With few ticks, moose retain a brown coat; (b) at high numbers of ticks, moose self-groom, destr
Right-sided Heart Failure Right-sided Heart Failure
(a) Male competition can be fierce. (b) This male baboon has bite wounds suffered in competition wit (a) Male competition can be fierce. (b) This male baboon has bite wounds suffered in competition wit
Pulmonary Congestion, which May Result from Congestive Heart Failure Pulmonary Congestion, which May Result from Congestive Heart Failure
Video: Control of ventilation rate by other brain centers (posts, hypothalamus & cerebral cortex)

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