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11.3 Science Vocab.
| Term | Definition |
|---|---|
| amphibian | vertebrate that is ectothermic and spends its early life in water. |
| tadpole | the larva of a frog or toad. |
| lung | organs of air-breathing vertebrates in which oxygen gas and carbon dioxide gas are exchanged between the air and the blood. |
| atria | the two upper chambers of the heart that receive blood. |
| ventricle | the lower chamber of the heart which pumps blood out to the lungs and body. |
| habitat | the specific environment in which an animal lives. |