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Blood is approximately twice as thick as water because of the cells and other components found in it.
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More than 150,000 Americans killed by cardiovascular disease are younger than the age of 65 years.
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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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Nearly 31 million adults in America have a total cholesterol level that is more than 240 mg per dL.
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Amoebae are the simplest type of protozoans, and are characterized by a feeding and dividing trophozoite stage that moves by temporary extensions called pseudopodia or false feet.