| Term | Definition |
| Porifera | pore bearing animals |
| Mollusca | have visceral mass |
| Cnidaria | Jellyfish |
| Cnidaria | Polyp |
| Nematoda | pinworms |
| Annelida | segmented worms |
| Mollusca | bivalves |
| Nematodes | filaria |
| Nematodes | ascaris |
| Nematodes | hookworms |
| Nematodes | round worms |
| Annelida | bristle worms |
| Annelida | leeches |
| Plathelminthes | proglottids |
| Porifera | asymmetrical |
| Mollusca | soft bodies |
| Cnidaria | Medusa |
| Annelida | earthworms |
| Cnidaria | nerve net |
| Porifera | filter feeders |
| Porifera | simplest animals |
| Porifera | sponges |
| Mollusca | gastropods |
| Platyhelminthes | scolex |
| Nematoda | heartworms |
| Mollusca | cephalpods |
| Platyhelminthes | diffusion |
| Playthelminthes | flukes |
| Playthelminthes | have a cuticle |
| Echinodermata | starfish |
| Echinodermata | sea urchins |
| Echinodermata | sand dollar |
| Echinodermata | sea cucumber |
| Echinodermata | spiny skin |
| Echinodermata | feed by turning stomachs inside out |
| Echinodermata | tube feet |
| Athropod | crustaceans |
| Athropod | archnids |
| Athropod | centipedes |
| Athropods | Millipedes |
| Athropods | insects |
| Athropods | crayfish |
| Athropods | lobster |
| Athropods | shrimp |
| Athropods | crabs |
| Athropods | pill bug |
| Athropods | cephalothorax |
| Crustaceans | swimmerets |
| Athropods | spiders |
| Athropods | ticks |
| Athropods | mites |
| Athropods | scorpians |
| Arachnids | spinnerets |
| Chordata | lancets |
| Chordata | sea squirts |
| Chordata | amphibians |
| Chordata | reptiles |
| Chordata | birds |
| Chordata | mammals |
| Chordata | notochord |
| Chordata | dorsal nerve |
| Chordata | post anal tail |
| Chordata | gill slits |
| Annelida | have a clitellum |
| Mollusca | have a foot |
| Mollusca | have a radula |
| Mollusca | squids |
| Mollusca | octopus |
| Mollusca | clams |
| Mollusca | oysters |
| Mollusca | mussels |
| Mollusca | slug |
| Mollusca | snail |
| Mollusca | have a mantle |
| Platyhelminthes | tapeworms |
| Platyhelminthes | Planaria |
| Platyhelmithes | flatworms |
| Mollusca | breath with gills |
| Annelids | have a closed circulatory system |
| Porifera | osculum |
| Mollusca | have a larva called a trochophore |
| Annelids | have aortic arches |
| Porifera | filter feeders |
| Cnidaria | sea anemones |
| Annelids | have setae |
| Mollusks | bivalves |
| Cnidaria | stinging animals |
| Annelids | nephridia |
| Mollusca | radula (not in bivalves) |
| Cnidaria | coral |
| Cnidaria | alterations of generations |
| Cnidaria | hollow digestive chord |
| Cnidaria | hydra |