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11.3 Science Vocab.
|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.|