| A | B |
|---|
| Mollusca | phylum name for all soft-bodied animals that often have a shell and have either a bilateral or asymmetrical body plan (the mollusks) |
| bivalve | word meaning "two shells" |
| univalve | word meaning "one shell" |
| mantle | special membrane covering a mollusk's organs; it produces the shell material |
| radula | rough, file-like tool inside the mouth of many mollusks (especially snails and slugs) |
| Class Gastropoda | The group of mollusks that includes snails, limpets, whelks, conchs, slugs, and sea slugs |
| Class Bivalvia | The group of mollusks that includes clams, oysters, mussels, and scallops. |
| Class Cephalopoda | The group of mollusks that includes squid, octopuses, and the chambered nautilis. |
| stomach | the Greek word root "gastro-" means ___. |
| head | The Greek word root "cephalo-" means ___. |
| heart | Where earthworms have a set of simple aortic arches, mollusks have a much more well-developed ___. |
| clam | The bivalve mollusk species that can grow to be almost the size of a man is the giant ____. |
| octopus | Name the head-foot mollusk with eight tentacles |
| nautilis | Name the head-foot mollusk that has ten tentacles and a spiraled shell with air-filled chambers in it |
| squid | Name the head-foot mollusk with ten tentacles and a streamlined, submarine-looking body |
| oyster | Name the bivalve that is best known for the jewel that its mantle produces when an irritating piece of sand gets into its soft body |
| jet propulsion | The fastest way for an octopus or squid to move through the water is by ___, forcing water out their excurrent siphon. |
| siphon | Clams feed and get oxygen by drawing water into their incurrent ___. |
| bilateral | Type of body symmetry that an octopus or squid has. |
| asymmetrical | Type of body symmetry that clams and oysters have (meaning there isn't any way to divide their body into two equal halves) |
| not | The Latin prefix "a-" means ____. (Hint: as in "asexual" and "asymmetrical") |
| visceral hump | the portion of a mollusk's body that contains the internal organs |
| trochophore | larval stage of immature mollusks that have cilia and are free-swimming |
| valve | word meaning "shell" |
