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All adults should have their cholesterol levels checked once every 5 years. During 2009–2010, 69.4% of Americans age 20 and older reported having their cholesterol checked within the last five years.

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Though the United States has largely rejected the metric system, it is used for currency, as in 100 pennies = 1 dollar. Previously, the British currency system was used, with measurements such as 12 pence to the shilling, and 20 shillings to the pound.

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More than one-third of adult Americans are obese. Diseases that kill the largest number of people annually, such as heart disease, cancer, diabetes, stroke, and hypertension, can be attributed to diet.

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Many medications that are used to treat infertility are injected subcutaneously. This is easy to do using the anterior abdomen as the site of injection but avoiding the area directly around the belly button.

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When blood is deoxygenated and flowing back to the heart through the veins, it is dark reddish-blue in color. Blood in the arteries that is oxygenated and flowing out to the body is bright red. Whereas arterial blood comes out in spurts, venous blood flows.

Many types of edible fungi are grown for the market. Many types of edible fungi are grown for the market.
Basidiomycetes produce diverse fruiting bodies. Basidiomycetes produce diverse fruiting bodies.
A slave market in Marrakesh, Morocco. This lithograph is from the 1800s. A slave market in Marrakesh, Morocco. This lithograph is from the 1800s.
The primary response causes B cells to produce memory B cells and a few antibodies. The second ... The primary response causes B cells to produce memory B cells and a few antibodies. The second ...
Stock Market Tracks Growth in GDP Stock Market Tracks Growth in GDP
The large, white flowers of giant saguaro cactus (Carnegiea gigantea) produce sweet nectar. The flow The large, white flowers of giant saguaro cactus (Carnegiea gigantea) produce sweet nectar. The flow
Video: Coronary Heart Disease

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