| A | B |
|---|
| When animals are cut lengthwise, the result is right and left mirror images of each other called | Bilateral symmetry |
| A large muscular tube, which sucks food in and then passes it into the digestive cavity | Pharynx |
| Unsegmented worms that appear flat | Flatworms |
| This type of worm has a digestive system with two openings and a hydrostatic skeleton | Roundworm |
| The soft outter layer on mollusks | Mantle |
| A body cavity completely lined with mesoderm | Coelom |
| This large class includes mollusks with shells, such as snails and conches | Gastropoda |
| Clams, mussles and scallops are all | Bivalvia |
| Include nautiluses, cuttlefishes, squids and octopusus | Cephalopoda |
| where blood travels inside a continuous network of vessels | Closed Circulatory System |
| muscles that surround and are supported by a water filled cavity. | Hydrostatic Skeleton |
| Earthworms, leeches and other wormlike animals whose bodies are divided into three segments | Annelids |
| In earthworms, wastes from cellular metabolism are excreted through tubes called? | Nephrida |
| Free living or tube dwelling marine worms | Polychaeta |
| The padlike structures on polychaeta's are called | Paprpodia |
| These worms do not have parapodia or specialized sense organs | Oligochaeta |
| The only annelids without setae or parapodia,leeches. | Hirudinea |
