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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).

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When intravenous medications are involved in adverse drug events, their harmful effects may occur more rapidly, and be more severe than errors with oral medications. This is due to the direct administration into the bloodstream.

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The tallest man ever known was Robert Wadlow, an American, who reached the height of 8 feet 11 inches. He died at age 26 years from an infection caused by the immense weight of his body (491 pounds) and the stress on his leg bones and muscles.

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In 2012, nearly 24 milliion Americans, aged 12 and older, had abused an illicit drug, according to the National Institute on Drug Abuse (NIDA).

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Walt Disney helped combat malaria by making an animated film in 1943 called The Winged Scourge. This short film starred the seven dwarfs and taught children that mosquitos transmit malaria, which is a very bad disease. It advocated the killing of mosquitos to stop the disease.

World human population growth through history illustrates an exponential growth pattern. World human population growth through history illustrates an exponential growth pattern.
Body size and population density of herbivorous mammals Body size and population density of herbivorous mammals
The Dugong is an endangered species; the largest remaining population is found in Australian waters The Dugong is an endangered species; the largest remaining population is found in Australian waters
NCC MERP Index for Categorizing Medication Errors NCC MERP Index for Categorizing Medication Errors
Therapeutic index: (a) Drug X has a therapeutic index of 4. (b) Drug Z has a therapeutic index of 2. Therapeutic index: (a) Drug X has a therapeutic index of 4. (b) Drug Z has a therapeutic index of 2.
Air Quality Index Air Quality Index
Video: Hemoglobin's affinity with oxygen - carbon dioxide, temperature and bisphosphoglycerate (BPG)

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