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12 Cards in this Set
- Front
- Back
larval stage in many mollusks and annelids
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troctophore
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central section of a mollusk’s body that contains its organs
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visceral mass
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heavy fold of tissue that surrounds the visceral mass of mollusks
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mantle
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in a mollusk, muscular region used for locomotion
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foot
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rasping tonguelike organ of mollusks used in obtaining food
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radula
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tiny tubular organ of excretion that filters cellular wastes from the coelom of certain invertebrates
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nephiridium
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thick muscle that attaches the two valves of a mollusk and caused the shell to open and close
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adductor muscle
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hollow tube of bivalves used for sucking in and expelling sea water
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siphon
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the primitive brain contained in one anterior segment of an annelid
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cerebral ganglion
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internal body walls of annelids
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septa
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external bristles on annelids
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seta
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fleshy appendage of marine annelids
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parapodium
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