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4 Cards in this Set

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  • Back
PROTONEPHRIDIA
an excretory system, such as the flame bulb system of flatworms, consisting of a network of tubules lacking internal openings
PLANARIAN
a free-living flatworm found in unpolluted ponds and streams
ALIMENTARY CANAL
a digestive tract consisting of a tube running between a mouth and an anus; also called a complete digestive tract
PARTHENOGENESIS
asexual reproduction in which females produce offspring from unfertilized eggs