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The heart is located in the center of the chest, with part of it tipped slightly so that it taps against the left side of the chest.
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In the United States, there is a birth every 8 seconds, according to the U.S. Census Bureau's Population Clock.
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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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The term pharmacology is derived from the Greek words pharmakon("claim, medicine, poison, or remedy") and logos ("study").
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Vaccines prevent between 2.5 and 4 million deaths every year.