air sac

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Related to alveolar sac: Alveolar ducts
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  • noun

Synonyms for air sac

a tiny sac for holding air in the lungs

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any of the thin-walled extensions of the tracheae of insects

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any of the membranous air-filled extensions of the lungs of birds

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References in periodicals archive ?
Robinson, "Flow in a terminal alveolar sac model with expanding walls using computational fluid dynamics," Inhalation Toxicology, vol.
This finding also provides a fine-tuned molecular mechanism underlying the interaction and communication between epithelial cells and macrophages for maintaining an immune homeostasis of microenvironment alveolar sac in response to Mtb infections.
In detail, lung specimens were sectioned at 5 [micro]m for light microscopy and H&E staining was performed to investigate the number of alveolar sacs in a blinded fashion [23, 24, 30, 35].
The normal architecture of the lungs section showed numerous clear alveoli (A) and alveolar sacs (AS).
4D) can be found in the proximities of the alveolar sacs of the two species of Amazonian cetaceans, a fact that resembles the study of Crespo & Lauria De Cidre (2005), who showed the presence of myoelastic sphincter distributed near the alveolar sacs of the lungs of Pontoporia blainvillei.
This alveolar surface area accounts for only surface area of the airways (alveolar ducts) and not the alveolar sacs, and thus is a low estimate of the actual alveolar surface area.
Emphysema is defined in terms of anatomical changes to the distal, or peripheral, structures of the lungs, i.e., the terminal bronchioles, alveolar ducts, and alveolar sacs. Emphysema represents a pathological diagnosis involving permanent enlargement of alveoli.
These lead into alveolar sacs resembling bunches of grapes.
But then again, it may not; it may stick to a cell wall somewhere on the 200 [m.sup.2] or so of exposed tissue in Susan's alveolar sacs.