| A | B |
|---|
| animal | a multicellular heterotroph whose cells lack cell walls |
| bilateral symmetry | body plan whose sides of the body mirror each other |
| radial symmetry | body plan whose body is organized around the center of the mouth |
| asymmetry | has no symmetry or body plan |
| invertebrate | an animal that does not have a backbone |
| Porifera | phyla of sponges that are a sac of cells with many pores |
| pores | a small opening or hole |
| spicules | small hard fibers that make up the framework of a sponge |
| sexual reproduction | reproduction involving two parents |
| asexual reproduction | reproduction involving one parent |
| polyp | body shape of a Cnidarian that looks like a vase |
| medusa | body shape of a Cnidarian that looks like an upside down bowl |
| nematocysts | stinging tentacles of a Cnidarian |
| Cnidarian | Phyla of animals that have a central body cavity, one opening and tentacles that sting |
| regeneration | the ability of an organism to regrow lost body parts |
| Trichinosis | a disease that is caused by eating uncooked pork |
| setae | tiny bristles that help Annelids move |
| crop | an organ in the digestive system of an earthworm that stores food |
| gizzard | an organ in the digestive system of an earthworm that grinds food |
| segment | an identical or almost identical repeating body part |
