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It is believed that humans initially contracted crabs from gorillas about 3 million years ago from either sleeping in gorilla nests or eating the apes.

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Anesthesia awareness is a potentially disturbing adverse effect wherein patients who have been paralyzed with muscle relaxants may awaken. They may be aware of their surroundings but unable to communicate or move. Neurologic monitoring equipment that helps to more closely check the patient's anesthesia stages is now available to avoid the occurrence of anesthesia awareness.

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Blood in the urine can be a sign of a kidney stone, glomerulonephritis, or other kidney problems.

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Giardia is one of the most common intestinal parasites worldwide, and infects up to 20% of the world population, mostly in poorer countries with inadequate sanitation. Infections are most common in children, though chronic Giardia is more common in adults.

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Barbituric acid, the base material of barbiturates, was first synthesized in 1863 by Adolph von Bayer. His company later went on to synthesize aspirin for the first time, and Bayer aspirin is still a popular brand today.

Allen Test: A patent ulnar artery reveals the return of palm perfusion despite radial artery compres Allen Test: A patent ulnar artery reveals the return of palm perfusion despite radial artery compres
Pronation and supination of the forearm. Pronation and supination of the forearm.
Pronation and Supination Pronation–Lying prone (face downward); also turning the palm downward. Supi Pronation and Supination Pronation–Lying prone (face downward); also turning the palm downward. Supi
Downward movement of the piston lowers the air pressure inside the combustion chamber. The pressure ... Downward movement of the piston lowers the air pressure inside the combustion chamber. The pressure ...
A typical evaporative emission control system. Note that when the computer turns on the canister ... A typical evaporative emission control system. Note that when the computer turns on the canister ...
Knuckling effleurage (knuckle to palm) performed on the back. Knuckling effleurage (knuckle to palm) performed on the back.
Video: Primate Evolutionary Tree Animation

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