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Definition
| contains digestive, circulatory, respiratory, and reproductive organs |
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Term
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Definition
| Dorsal body wall that covers visceral mass |
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Definition
| The space between the mantle and body wall |
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Definition
| A respiratory organ (gill) found in molluscs |
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Term
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Definition
| A "chainsaw" like structure used in feeding. |
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Term
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Definition
| Burrowers use hydraulics to bury themselves |
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Term
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Definition
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Term
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Definition
| Middle layer; made of calcium carbonate |
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Term
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Definition
| Innermost layer; laid down in thin layers |
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Term
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Definition
| when an irritant is lodged between the shell and mantle; layers of nacre are secreted around the foreign material. |
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Term
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Definition
| Consists of a heart, blood vessels, and blood sinuses |
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Definition
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Term
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Definition
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Term
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Definition
| Free-swimming larva that emerges from the egg |
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Term
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Definition
| A uniquely molluscan larval stage. |
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Term
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Definition
| contains the feeding, cephalic sensory, and locomotor organs |
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Definition
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Definition
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Definition
| A twisting process that alters the relative poisition of the shell and the position of the visceral and pallial organs by 180 degrees |
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Term
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Definition
| Contains the oldest and smallest whorl; highest point |
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Term
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Definition
| A whorl is a single, complete 360° revolution or turn in the spiral growth of a mollusc shell |
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Term
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Definition
| The problem of wastes being washed back over the gills |
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Term
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Definition
| All the whorls are in a single plane; primitive state |
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Term
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Definition
| Each whorl is to the side of the previous one; provides more compactness. |
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Term
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Definition
| The opening of the mantle cavity to the outside |
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Term
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Definition
| The anus opens to the right side or even to the posterior |
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Term
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Definition
| Cord of tissue running through the shell of a nautiloid, connecting all chambers with the animal's body |
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Term
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Definition
| A flattened flexible internal support in a squid |
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Term
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Definition
| A tube-like structure in which water flows |
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Definition
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Term
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Definition
| Specialized arm that serves as a male reproductive organ in cephalopods |
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Term
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Definition
| Cells in the skin that contain pigment granules |
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Term
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Definition
| Strong muscles that draws the shell of bivalves together |
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Term
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Definition
| The bulge, the oldest part of the shell with growth occurring outward in rings |
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Term
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Definition
| Empties into the rectum; it contains an ink gland that secretes sepia when the animal is alarmed. |
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Term
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Definition
| Some deep water cephalopods emit light |
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