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Bio CH7
Biology CH7 Simple Animals
| Term | Definition |
|---|---|
| anus | an opening through which undigested food leaves the body |
| cyst | a young worm with a protective covering |
| flatworm | the simplest worms; they have flattened bodies |
| hookworm | a roundworm that is a parasite of humans |
| invertebrate | animals without backbones |
| mantel | a thin, fleshy tissue that covers a soft-bodied animal |
| planarian | a common freshwater flatworm that is not a parasite |
| pore | a small opening in a sponge through which water enters |
| roundworm | worms that have long bodies with pointed ends |
| segmented worm | worms with bodies divided into sections called segments |
| soft-bodied animal | animals with a soft body that is usually protected by a hard shell |
| sponge | simple invertebrates that have pores |
| stinging-cell animal | animals with stinging cells and hollow,sock-shaped bodies that lack organs |
| symmetry | the balanced arrangement of body parts around a center point or along a center line |
| tapeworm | a kind of flatworm that has a flattened, ribbon-like body divided into sections |
| tentacle | armlike parts of stinging-cell animals |
| vertebrate | animals with backbones |
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