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12 Cards in this Set

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larval stage in many mollusks and annelids
tochophore
central section of a mollusks body that contains its organs
visceral mass
heavy fold of tissue that surrounds the visceral mass off mollusks
mantle
in mollusk, muscular region used for locomation
foot
tongue-like organ of mollusks used in obtaining food
radula
tiny tubular organ of excretion that filters cellular wastes from the coelom of certain invertebrates
nephridium
thick muscle that attaches the two valves of a mollusk and causes the shell to open and close
adductor muscle
hollow tube of bivalves used for sucking in and expelling sea water
siphon
the primitive brain contained in one anterior segment of an annelid
cerebral ganglion
internal body walls that seperate the segments of most annelids
septa
external bristles on annelids that increase traction as the annelid crawls along
setae
fleshy appendage of marine annelids
parapodium