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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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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Human kidneys will clean about 1 million gallons of blood in an average lifetime.
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Approximately 15–25% of recognized pregnancies end in miscarriage. However, many miscarriages often occur before a woman even knows she is pregnant.
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The B-complex vitamins and vitamin C are not stored in the body and must be replaced each day.
Selected skeletal muscles (anterior view).
Selected Crystalloid IV Solutions
Selected Drugs That Cause Thrombocytopenia
Controlled Scientific Experiments Scientists use experimental research to test hypotheses