| A | B |
|---|
| Vertebrate | animals with backbones |
| Invertebrate | animals without backbones |
| Radial Symmetry | animals with body parts arranged in a circle around a central point |
| Bilateral Symmetry | an animal with its body parts arranged in the same way on both sides of its body. |
| Asymmetry | an animal with no definite shape and no lines of symmetry |
| Sessile | organisms that remain attached to one place during their lifetimes |
| Filter Feeder | organisms that filter food from water as it is pulled in through their pores |
| Collar Cell | cells that line the inside of the sponge |
| Regeneration | ability to replace body parts |
| Hermaphrodite | animal that produces both sperm and eggs |
| larva | fertilized egg develops into a young organism |
| Cnidarian | group of animals, describes the stinging cells that all members of this phylum have |
| Tentacle | armlike structures that surround the mouth of a cnidarians |
| Polyp | cnidarian that is shaped like a vase and is usually sessile |
| Medusa | cnidarian that is bell-shaped and free swimming |
| free-living | organism that doesn't depend on one particular organism for food or a place to live |
| anus | an opening at the end of the digestive tract through which wastes leave the body |
| cyst | young worm with a protective covering |
