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Not getting enough sleep can greatly weaken the immune system. Lack of sleep makes you more likely to catch a cold, or more difficult to fight off an infection.
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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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There are more bacteria in your mouth than there are people in the world.
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Human kidneys will clean about 1 million gallons of blood in an average lifetime.
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Medication errors are more common among seriously ill patients than with those with minor conditions.