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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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Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.
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It is difficult to obtain enough calcium without consuming milk or other dairy foods.
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People about to have surgery must tell their health care providers about all supplements they take.
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Autoimmune diseases occur when the immune system destroys its own healthy tissues. When this occurs, white blood cells cannot distinguish between pathogens and normal cells.