Definition of air sac Air sac
We found 5 definitions of air sac from 3 different sources.
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What does air sac mean?
WordNet
Noun |
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| air sac - any of the membranous air-filled extensions of the lungs of birds | ||
| sac a structure resembling a bag in an animal | ||
| air sac - any of the thin-walled extensions of the tracheae of insects | ||
| sac a structure resembling a bag in an animal | ||
| air sac - a tiny sac for holding air in the lungs; formed by the terminal dilation of tiny air passageways | ||
| alveolus, air cell | ||
| sac a structure resembling a bag in an animal | ||
| lung either of two saclike respiratory organs in the chest of vertebrates; serves to remove carbon dioxide and provide oxygen to the blood | ||
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Webster DictionaryWebster's Unabridged Dictionary 📘
- air sac
One of the spaces in different parts of the bodies of birds, which are filled with air and connected with the air passages of the lungs; an air cell.
OmegaWiki DictionaryOmegaWiki Dictionary Ω
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air sac
A tiny, thin-walled, capillary-rich sac in the lungs where the exchange of oxygen and carbon dioxide takes place.
