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consists of a layer of circular muscles and a layer of longitudinal muscles that (along with the nerve net) enable the body to move
An area in the vertebrate throat where air and food passages cross; in flatworms, the muscular tube that protrudes from the ventral side of the worm and ends in the mouth
An individual that functions as both male and female in sexual reproduction by producing both sperm and eggs
Form of asexual reproduction in which an organism split into two, and each half grows new parts to become a complete organism
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