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Did you know?

The longest a person has survived after a heart transplant is 24 years.

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Historic treatments for rheumatoid arthritis have included gold salts, acupuncture, a diet consisting of apples or rhubarb, nutmeg, nettles, bee venom, bracelets made of copper, prayer, rest, tooth extractions, fasting, honey, vitamins, insulin, snow collected on Christmas, magnets, and electric convulsion therapy.

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A headache when you wake up in the morning is indicative of sinusitis. Other symptoms of sinusitis can include fever, weakness, tiredness, a cough that may be more severe at night, and a runny nose or nasal congestion.

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Chronic marijuana use can damage the white blood cells and reduce the immune system's ability to respond to disease by as much as 40%. Without a strong immune system, the body is vulnerable to all kinds of degenerative and infectious diseases.

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Many people have small pouches in their colons that bulge outward through weak spots. Each pouch is called a diverticulum. About 10% of Americans older than age 40 years have diverticulosis, which, when the pouches become infected or inflamed, is called diverticulitis. The main cause of diverticular disease is a low-fiber diet.

Polytomies represent uncertainty about phylogenetic relationships Polytomies represent uncertainty about phylogenetic relationships
A blood smear. The smear reveals representative cells from each formed element group: red blood cell A blood smear. The smear reveals representative cells from each formed element group: red blood cell
The heme group The heme group
The eight α-helical segments (shown here as cylinders) are labeled A through H The eight α-helical segments (shown here as cylinders) are labeled A through H
Commensal Bacteria in the Human Small Intestine Commensal Bacteria in the Human Small Intestine
Group of Ants Group of Ants
Video: Effect of the environment on coat color in the Himalayan rabbit Animation

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