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The word drug comes from the Dutch word droog (meaning "dry"). For centuries, most drugs came from dried plants, hence the name.
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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.
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This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.
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There are 60,000 miles of blood vessels in every adult human.
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After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.