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Did you know?

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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The largest baby ever born weighed more than 23 pounds but died just 11 hours after his birth in 1879. The largest surviving baby was born in October 2009 in Sumatra, Indonesia, and weighed an astounding 19.2 pounds at birth.

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Though methadone is often used to treat dependency on other opioids, the drug itself can be abused. Crushing or snorting methadone can achieve the opiate "rush" desired by addicts. Improper use such as these can lead to a dangerous dependency on methadone. This drug now accounts for nearly one-third of opioid-related deaths.

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Normal urine is sterile. It contains fluids, salts, and waste products. It is free of bacteria, viruses, and fungi.

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Many of the drugs used by neuroscientists are derived from toxic plants and venomous animals (such as snakes, spiders, snails, and puffer fish).

Urinalysis. During a simple urinalysis, a stick with colored blocks is dipped into a urine specimen. Urinalysis. During a simple urinalysis, a stick with colored blocks is dipped into a urine specimen.
Release of ordered water favors formation of an enzyme-substrate complex Release of ordered water favors formation of an enzyme-substrate complex
Cascade of regulated splicing that controls sex determination in Drosophila embr Cascade of regulated splicing that controls sex determination in Drosophila embr
Release of preformed and newly synthesized (de novo) mediators from mast cells. Release of preformed and newly synthesized (de novo) mediators from mast cells.
Your Brain Controls Hunger and Satiation Your Brain Controls Hunger and Satiation
Palpating for rebound tenderness: Rapid release of pressure Palpating for rebound tenderness: Rapid release of pressure
Video: Heart sounds

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