| A | B |
|---|
| lung | saclike organ that takes oxygen from the air and delivers oxygen to the blood |
| amphibian | means "double life" |
| metomorphosis | the change from an immature form to an adult form |
| tadpole | aquatic, fish-shaped larva of a frog or toad |
| caecillians | look like earthworms or snakes, but have thin, moist skin |
| salamanders | closest type of amphibian that is related to prehistoric amphibians |
| vocal sacs | surrounds the vocal cords of frogs and helps them sing their songs |
| ecological indicators | amphibians can show changes in an ecosystem due to their thin skin |
