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12 Cards in this Set

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  • Back
adductor muscle
thick muscle that attaches the two valves of a mollusk and causes the shell to open and close.
cerebral ganglion
the primitive brain contained in one anterior segment of an annelid
foot
in mollusks, muscular region used for locomotion
mantle
heavy fold of tissue that surrounds the visceral mass of mollusks
nephridium
tiny tubular organ of excretion that filters cellular wastes from the coelom of certain invertebrates
parapodium
fleshy appendage of marine annelids
radula
rasping tongue like organ of mollusks used in obtaining food
septa
wall that internally divides body segments of annelids
seta
external bristles of annelids
siphon
hollow tube of bivalves used for sucking in and expelling sea water
trochophore
larval stage in many mollusks and annelids
visceral mass
central section of a mollusks body that contains its organs