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chapter 9.3
| Term | Definition |
|---|---|
| mantle | (1)the semiliquid region between the crust and the core of Earth (2)the outer layer of tissue that secrectes the shell of molluscs |
| chitin | the main component of the exoskeleton of many animals |
| siphon | (funnel) the tube-like extension through which water flows in and out of the mantle cavity in bivalves and cephalopods, and in tunicates |
| ink sac | a gland found in some cephalopods that secretes a dark fluid used to discourage predators |
| open circulatory system | a system where the blood or circulatory fluid is not contained in vessels and can flow into the body cavity |
| veliger | a planktonic larva in gastropods and bivalves |
| foot | the muscular locomotory structure of molluscs |
| valve | any of the two shells of bivalves and lamp shells |
| byssal thread | strong fiber secreted by mussels for attachment |
| pen | the reduced, thin shell of squids |
| ganglion | (pl. ganglia) clusters of nerve cells in gastropods and bivalves |
| redula | the ribbon-like band of teeth of molluscs |
| umbo | the region around the hinge of a bivalve's shell |
| biofouling | unwanted settlement of organisms on submerged surfaces of boats, piling, and other structures |
| crystalline style | an enzyme-releasing rod in the stomach of bivalves |
| spermatophore | a packet of sperm in cephalopods |
Created by:
torremir