mollusk glossary ward science
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Created by:
kateisthegr844 on December 16, 2008
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dumpies
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DA Girls, Home Of Da Boys, Da Double Dees (D.D.s), DA Groupy, DA HOME BASE
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42 terms
Terms | Definitions |
|---|---|
 obductor muscle | major muscle that closes valves on bivalve |
| anterior | front end |
| aperture | opening in a gastropod where the mollusk's foot can come and to move and eat |
| apex | top of the shell |
| bi- | means 2, prefix |
| bivalve | 2 shells. examples: scallops, oyesters and clams |
| body whorl | this contains the aperture of the shell in which one can fine the body of the mollusk. |
| cephalo | head |
| cilia | Hairs in the gills that make a current to push water into the mouth. |
| dorsal | near the upper surface |
| exhalent siphon | the siphon through which water exits the mollusk |
| foot | this helps move about and then this burrows into the sand like a shovel. |
| gastro | stomach |
| gastropod | literally "stomach foot"; a class of Mollusks characterized by a well-developed head, a stomach and a foot |
| gonad | releases sex cells (can have sperm and eggs, releases them at different times) |
| hermaphrodite | a organism with both female and male parts |
| hinge | the part that attaches the 2 shells of the bivalve together |
| inhalent siphon | The siphon through which water travels into the mollusk. |
| Labial Palps | Tells whatever comes into the shell where to go. |
| Larvae | the younger morphic stage of mollusks before adulthood |
| ligament | A tough muscle that holds the bi-valve together. It takes great strength to open. |
| Mantle | Fleshy membrane inside of shell that is responsible for shell production and color and cellular processes such as respiration |
| Mollusca | The Phylum that contains the classes Bivalva and Gastropoda. This phylum contains seven more class, but we are only interested in these two. |
| Mollusk | any invertabrate having a ''soft body' containing a mantle and a shell, used for protection, rigidity or camo. |
| operculum | the "trap door" some gastropods have. It is a piece of shell attached to the foot of the gastropod. This is used to seal the aperture when the organism is inside it's shell which provides protection from predators and drying out. |
| Palps | Sorts food from silt and substrate then moves food to the mouth. |
| periostracum | A brownish "outer skin" that hides the beautiful colors and patterns of the shell underneath it. When the mollusk dies, this is lost, and the shell's surface is revealed. |
| poda | foot |
| posterior | rear end |
| rib | Horizontal lines on the clam starting from the umbo |
| ring | the lines along the shell [horizontal], determines the age of the mollusk/ shell |
| siphon | a projecting tubular part of some animals, esp. certain mollusks, through which liquid enters or leaves the body. |
| Spire | Top part of gastropod shell. It is made of whorls. |
| Taxonomy | The naming of something using two words. |
| teeth | notches at the end of either shell in a bivalve that helps them clamp together |
| tentacle | sensory objects that sensor the smell and taste and detect chemicals in the area around them, then, then send signs back to the cerebral ganglia |
| torsion | When the veliger twists the top of its body 180 degrees and folds itself in half. It does this so that it can fit its bottom in the shell and its foot and head out of the shell, but still get its whole body inside the shell when it needs to. this happens rapidly, and is undergone in between the veliger and mini-adult stages. |
| umbo | The oldest part of the bivalves; a beak. |
| valve | shell |
| veliger | A baby gastropod is called a ... for the first 5-12 weeks of its life. these are too small to be able to move around with their heavy shells weighing them down, so they have winglike structures for swimming and feeding. There are cilia on the structures that help these move around. At the end of the 5-12 weeks, these undergo torsion and become mini-adults. |
| ventral | near the lower surface |
| whorl | each separate coil in a gastropod's shell. |
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