There are 20 feet of blood vessels in each square inch of human skin.
Did you know?
Asthma cases in Americans are about 75% higher today than they were in 1980.
Did you know?
About one in five American adults and teenagers have had a genital herpes infection—and most of them don't know it. People with genital herpes have at least twice the risk of becoming infected with HIV if exposed to it than those people who do not have genital herpes.
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The first monoclonal antibodies were made exclusively from mouse cells. Some are now fully human, which means they are likely to be safer and may be more effective than older monoclonal antibodies.
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Essential fatty acids have been shown to be effective against ulcers, asthma, dental cavities, and skin disorders such as acne.
Plant Diagram
Earthworm Internal Diagram
Diagram of a Nephron
Diagram of a hair follicle.
Cloud Types: Middle Clouds
Reading a Food Label The Nutrition Facts panel is easy to read—once you know what to look for