|
|
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.
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).
Opium has influenced much of the world's most popular literature. The following authors were all opium users, of varying degrees: Lewis Carroll, Charles, Dickens, Arthur Conan Doyle, and Oscar Wilde.
The human body produces and destroys 15 million blood cells every second.
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.
![Pronation and Supination Pronation–Lying prone (face downward); also turning the palm downward. Supi](https://biology-forums.com/gallery/47/medium_14755_24_09_12_7_41_28_89561095.jpeg)
![A) Butterfly-shaped lupus rash. Lupus is the Latin word for wolf; the face rash was thought to look ...](https://biology-forums.com/gallery/30/medium_548020_08_06_17_10_08_20_306301132.jpeg)