| A | B |
| Mollusca | soft body |
| lateral | side |
| crino | flower or lilly |
| phora | to have or bear |
| placo | plate |
| poly | many |
| "bi" "valvia" | "2 shells", class of mollusks (ex. clam, oysters |
| pelecy | hatchet |
| poda | foot |
| radula | rough, tongue-like organ with rows of teeth-like structures |
| visceral mass | just beneath mantle, consistes of internal organs |
| mantle | thin layer of tissue that covers most of the mollusc's body like a cloak |
| bilateral | type of symmetry that mollusca have |
| sexual | type of reproductive system |
| ganglia | system of nerves that conduct impulses |
| cephalopoda | octopus, squid, cuttlefish and nautilus belong to this class |
| gastropoda | snals, slugs and sea hares belong to this class |
| monoplacophora | class of mollusca that have one shell |
| polyplacophora | chiton belong to this class |
| chiton | rolls into a ball when threatened |
| gastro | stomach |
| umbo | knob on clam's shell |
| cephala | head |
| Annelida | phylum of segmented worms |
| eucoelomate | true body cavity lined with mesoderm |
| septa | wall |
| setae | bristles (hair) used for movement |
| polychaeta | "many bristles" - class of marine tubeworms |
| oligochatea | "few bristles" - class of decomposers (ex. earthworm) |
| Hirudinea | class of parasitic leeches |
| crop | food storage in segmented worms |
| gizzard | grinds food in segmented worms |
| metamerism | one segment after another |