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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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As the western states of America were settled, pioneers often had to drink rancid water from ponds and other sources. This often resulted in chronic diarrhea, causing many cases of dehydration and death that could have been avoided if clean water had been available.
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The first oral chemotherapy drug for colon cancer was approved by FDA in 2001.
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There are 60,000 miles of blood vessels in every adult human.
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The human body produces and destroys 15 million blood cells every second.