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Throughout history, plants containing cardiac steroids have been used as heart drugs and as poisons (e.g., in arrows used in combat), emetics, and diuretics.

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According to the Migraine Research Foundation, migraines are the third most prevalent illness in the world. Women are most affected (18%), followed by children of both sexes (10%), and men (6%).

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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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Colchicine is a highly poisonous alkaloid originally extracted from a type of saffron plant that is used mainly to treat gout.

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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.

The human oxygen-hemoglobin dissociation curve. The human oxygen-hemoglobin dissociation curve.
The major muscles of the human body, anterior side. The major muscles of the human body, anterior side.
Functional MRI Scans These scans of human brains show localized average increases in neural activity Functional MRI Scans These scans of human brains show localized average increases in neural activity
Levels of Ghrelin in Human Blood Plasma Levels of Ghrelin in Human Blood Plasma
The human digestive system The human digestive system
Share of Human Capital in Wages in Advanced Countries Share of Human Capital in Wages in Advanced Countries
Video: Dissociative Disorders (Part 1)

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