| A | B |
|---|
| invertebrate | animal without a backbone |
| filter feed | how sponges obtain food |
| spikes | sponges use for protection |
| medusa | bowl-shaped body form |
| polyp | vase-shaped body form |
| stinging cells | cnidarians use to paralyze food |
| tentacles | cnidarians use to pull prey into their mouth |
| ocean | where sponges and cnidarians live |
| flat, round, segmented | 3 kinds of worms |
| planarian | example of a flat worm |
| hook worm | example of a round worm |
| earthworm | example of a segmented worm |
| regeneration | regrow body parts |
| parasite | lives on or harms another animal |
| bristles | what worms use to help them move |
| radial symmetry | many lines of symmetry that all go through a central point |
| bilateral symmetry | 2 halves that are mirror images |
| jellyfish | example of a medusa |
| usually stay in one place | how sponges move |
| one-way digestive system | type of worm digestive system |
| sexual reproduction | how most animals reproduce |
| multicellular | animals have many cells |
