air sac vs lung
lung vs air sacair sac and lung both are nouns.
| Word | Noun | Adjective | Verb | Adverb |
|---|---|---|---|---|
| air sac | Yes | No | No | No |
| lung | Yes | No | No | No |
| air sac (noun) | lung (noun) |
|---|---|
| any of the membranous air-filled extensions of the lungs of birds | either of two saclike respiratory organs in the chest of vertebrates; serves to remove carbon dioxide and provide oxygen to the blood |
| any of the thin-walled extensions of the tracheae of insects | |
| a tiny sac for holding air in the lungs; formed by the terminal dilation of tiny air passageways |
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