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(Marine Bio)
9.3
| Term | Definition |
|---|---|
| Mantle | A thin layer of tissue that secretes the shell |
| chitin | A highly resistant carbohydrate also found in other invertebrates |
| siphons | vacume like way of taking something |
| ink sac | They can distract potential predators by emitting a cloud of dark fluid produced by it. |
| open circulatory system | Blood flows out of vessels into open spaces |
| veliger | A planktonic larva that has a tiny shell. |
| foot | Is the ventral, muscular locomotory structure |
| valves | A shell with two parts |
| abyssal threads | mussels use this for attachment |
| pen | This shell is reduced to a stiff shell embedded in the upper surface of the mantle. |
| ganglia | clusters of nerve cells located in different parts of the body |
| radula | A ribbon of small teeth that is used to feed |
| umbo | the upper hump near the hinge of each shell, is the oldest part of the shell |
| biofouling | the undersirable accumulation of organisms that settle on the bottoms of boats pilings |
| crystalline style | an enzyme-secreting rod in the stomach |
| spermatophores | a packet of sperm |