Flashcard: Introduction to Mollusca Biology — 10 carte

Mollusca — invertebrate features?

Soft-bodied, often with a shell.

Mollusca — body features?

Soft, unsegmented, often with shell

Radula — role?

Feeding organ with chitinous teeth.

Main molluscan parts?

Foot, visceral, mantle, mantle cavity

Cephalopods — circulatory system?

Closed circulatory system.

Radula — presence?

Feeding organ; absent in bivalves

Circulatory system in molluscs?

Open in gastropods, bivalves; closed in cephalopods

Nervous system variation?

Simple ganglia to complex brains in cephalopods

Shell — secreted by?

Mantle

Main molluscan classes?

Polyplacophora, Gastropoda, Bivalvia, Cephalopoda