| A | B |
|---|
| Mollusca | phylum name for mollusks |
| mantle | membrane that covers mollusks' organs |
| radula | rough, tonguelike organ of a snail |
| mollusks | organisms with soft body parts, a head, foot and a mass of tissues and organs |
| squid, octopus, snail, clam, mussel, oyster | types of mollusks |
| Arthropoda | phylum name for arthropods |
| insects, arachnids, crustaceans | types of arthropods |
| arthropods | animals with jointed legs and exoskeletons |
| exoskeleton | hard covering that supports and protects the body |
| molting | the process of shedding the outer covering |
| chitin | hard material that makes up the exoskeleton of arthropods |
| insects | the largest group of arthropods |
| abdomen | third section of an insect's body |
| spicules | openings to air tubes of a grasshopper |
| thorax | middle section of an insect's body |
| tympanum | hearing organ in a grasshopper |
| social insects | insects live in colonies like bees or ants |
| metamorphosis | changes during the stages of development of an insect |
| cocoon | protective covering around the pupa |
| larva | the wormlike stage of insect development |
| nymph | young insect that looks like the adult |
| pupa | resting stage during complete metamorphosis |
| incomplete metamorphosis | egg, nymph, and adult |
| complete metamorphosis | egg, larva, pupa, adult |
| Echinodermata | phylum name for echinoderms |
| sea stars, sea urchins, sea cucumber | types of echinoderms |
| tube feet | small suckerlike structures of echinoderms |
| endoskeleton | internal skeleton |
| echinoderms | animals with spiny skin |
| regeneration | ability of an organism to regrow lost parts |
| sea stars, lobster, crab, glass tailed lizards | animals with the ability to regrow lost body parts |
| planaria | organism that can be cut into pieces and each piece becomes a new organism |
