| A | B |
|---|
| fish | an animal that lives in water and breathes through gills |
| reptile | an animal with a dry body covered with scales |
| bird | an animal with feathers |
| amphibian | an animal with smooth wet skin |
| mammal | an animal that has hair or fur and drinks its mother's milk |
| backbone | a long row of bones in the back of an animal |
| vertebrate | an animal with a backbone |
| groups of animals | with backbones and without backbones |
| invertebrate | animals without backbones |
| pore | opening on a sponge |
| tentacles | armlike body part |
| mollusk | an animal with a soft body |
| sponge | animals with opening all over their bodies |
| jellyfish | an animal with tentacles |
| worm | an animal with a long soft body |
| spiney skins | an animal with hard points or spines covering their body |
| jointed legs | an animal with legs that have sections |
