| A | B |
|---|
| Mollusks | have soft bodies and some have hard shells |
| mollusks are more | complex than sponges |
| visceral mass | a sac that holds all the systems |
| Mantle | produces the hard shell |
| muscular foot | helps a mollusk move about |
| gastropods | mollusks that glide along on a foot underneath their bodies |
| bivalves | two shelled mollusks |
| cephalopods | the mollusk foot is divided into tentacles |
| radula | a tongue-like organ with teeth used for getting food |
| Snails, limpets, and slugs | are gastropods |
| clams, oysters, scallops, mussels | are bivalves |
| octopus, squid, and nautilus | are cephalopods |
| pearls come from | oysters |
