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Prostaglandins were first isolated from human semen in Sweden in the 1930s. They were so named because the researcher thought that they came from the prostate gland. In fact, prostaglandins exist and are synthesized in almost every cell of the body.

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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.

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Amoebae are the simplest type of protozoans, and are characterized by a feeding and dividing trophozoite stage that moves by temporary extensions called pseudopodia or false feet.

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In 1886, William Bates reported on the discovery of a substance produced by the adrenal gland that turned out to be epinephrine (adrenaline). In 1904, this drug was first artificially synthesized by Friedrich Stolz.

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

An analogy for how cardiac output, resistance, and blood pressure are related. An analogy for how cardiac output, resistance, and blood pressure are related.
Basic steps in hemostasis. Basic steps in hemostasis.
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Permeability to Ions During the Action Potential Permeability to Ions During the Action Potential
Procedures and Diagnostic Tests Related to the Female Reproductive System Procedures and Diagnostic Tests Related to the Female Reproductive System
Age-related cross-sectional changes on a variety of cognitive tasks. Note that although both ... Age-related cross-sectional changes on a variety of cognitive tasks. Note that although both ...
Video: Introduction to Eating Disorders

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