| A | B |
|---|
| Annelida ("Annulus" - ring) | 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 |
