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The lipid bilayer is made of phospholipids. They are arranged in a double layer because one of their ends is attracted to water while the other is repelled by water.

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It is difficult to obtain enough calcium without consuming milk or other dairy foods.

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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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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.

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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.

Human body: levels of organization. Human body: levels of organization.
Health Risks Associated with Levels of Body Fat Health Risks Associated with Levels of Body Fat
Body Part, Method of Examination, and Equipment Used During the General Physical Examination Body Part, Method of Examination, and Equipment Used During the General Physical Examination
The clock generator produces a series of pulses that are used by the microprocessor and other ... The clock generator produces a series of pulses that are used by the microprocessor and other ...
Fascial sheaths surrounding and linking the muscles of the back of the body. Fascial sheaths surrounding and linking the muscles of the back of the body.
Newborns, infants, and children have a high percentage of body weight composed of water... Newborns, infants, and children have a high percentage of body weight composed of water...
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