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Mollusca
Phyla Vocab
| Question | Answer |
|---|---|
| mantle | secretes shell, covers/protects visceral mass, functions in gas exchange, excretion, and release of reproductive products |
| osphradia | a chemosensory structure that is located in the mantle cavity, capable of smelling chemical substances in the water |
| statocysts | vesicles containing a statolith (little stone like structures composed of calcium carbonate) that function as balancing organs |
| radula | a minutely toothed, chitinous ribbon which is used for cutting or scraping food |
| trocophore larvae | a type of free swimming planktonic marine larvae with several bands of cilia |
| veliger larvae | the planktonic larva of marine gastropod and bivalves |
| torsion | placing the anus over the head and causing loss of right gill |
| Planospiral | coiling in a single plane |
| Conispiral | coiling in two planes |
| dextral | right |
| sinistral | left |
| umbo | oldest part of shell (bivalvia) |
| 4 distinct body plan characteristics | head, muscular foot, (sensory organs and muscles) visceral mass,(digestive, reproductive, circulatory organs) mantle(secretes the shell, cavity contains gills or lungs) |
| "HAM" | hypothetical ancestral mollusc |
| pearls | molluscs deposits layers of nacre around an irritant that gets lodged between the mantle and shell |
| limpets | straight shell |
| snails | coiled shell |
| protobranch gills | form in gastropods, chitons and cephalopods |
| eulamellibranch gills | form in bivavles, used for both gas exchange and feeding |
| hemocyanin | oxygen carrying pigment in blod |
| ctenidia | gills |
| operculum | a "door like" structure on the dorsal side of the foot that closes the aperature (opening) of the shell when the animal (snail) retracts |
| cerata | dorsal and lateral outgrowths into which digestive ducts extend - with a cnidosac at the terminal end |
| siphons | extensions of the mantle, permit water to enter and exit cavity while buried |
| chromatophores | pigment cells produce color changes |
| siphuncle | cord of tissue connected to visceral mass; removes water from new chambers as animal grows |
| nautilus | only extant cephalopod with a predominant shell |
| hectocotylus | modified arm in male octopus that transfers a spermatophore (sperm packet) |
Created by:
jmw09d
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