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Did you know?

Your skin wrinkles if you stay in the bathtub a long time because the outermost layer of skin (which consists of dead keratin) swells when it absorbs water. It is tightly attached to the skin below it, so it compensates for the increased area by wrinkling. This happens to the hands and feet because they have the thickest layer of dead keratin cells.

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Vaccines prevent between 2.5 and 4 million deaths every year.

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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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The FDA recognizes 118 routes of administration.

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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.

Overview of blood flow through vessels in a closed circulatory system. Overview of blood flow through vessels in a closed circulatory system.
Nurse examining and measuring hematuria sample from client with a UTI Nurse examining and measuring hematuria sample from client with a UTI
Leukemia. A blood smear from a patient suffering from leukemia demonstrates the abundance of enlarge Leukemia. A blood smear from a patient suffering from leukemia demonstrates the abundance of enlarge
A finger-stick is useful for obtaining small amounts of blood. A finger-stick is useful for obtaining small amounts of blood.
Blood Buffering Blood Buffering
E. coli O157: H7 is the strain of E. coli bacteria that causes the most foodborne illness E. coli O157: H7 is the strain of E. coli bacteria that causes the most foodborne illness
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