| A | B |
|---|
| parasite | an organism that depends on another organism for food and a place to live |
| radial symmetry | body parts arranged around a central point |
| hermaphrodite | an organism that makes both an egg and a sperm |
| collar cells | cells that line the inside of the sponge |
| invertebrates | organisms with no backbone |
| anus | opening for digestive waste |
| sessile | attached, not moving animal |
| bilateral symmetry | body parts the same on each side |
| larva | a young organism different from the adult |
| anterior | the front end of an animal |
| Porifera | the phylum given to sponges |
| medusa | a bell shaped cnidarian |
| polyp | cnidariam shaped like a tube or vase |
| filter feeder | feeders that gather their food through water |
| regeneration | an organism's ability to replace body parts |
| asymmetry | organisms that have no definite shape |
| cnidarians | Latin for "stinging cells" |
