air sac

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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 ?
PNEUMONIA: Caused by an infection from bacteria, viruses or fungi which irritates the lungs and causes the tiny air sacs (alveoli) to become inflamed and to swell up with fluid.
Pneumonia develops only when these microorganisms gain a foothold in the tiny air sacs of the lungs, she said.
It inflames these air sacs so they produce mucus, which pools inside them.
Now, a new study by researchers from Ohio University, College of the Holy Cross and the University of Leicester explains how balloon-like air sacs, which extended from the lungs to inside the skeleton of pterosaurs, provided an efficient breathing system for the ancient beasts.
The elastic tissue supporting the tiny air sacs in the lungs responsible for taking in oxygen and releasing carbon dioxide can be destroyed, resulting in emphysema.
They stamp their feet in a dance imitated by the Dakota Indians, while puffing their black, tan and white plumage and emitting eerie "booming" sounds from the orange and yellow, scarlet-fringed air sacs on the side of their necks.
About 2 million people have emphysema, an illness that destroys the air sacs in the lungs.
LiquiVent(r) -- an oxygen-carrying "liquid ventilation" drug administered into the lungs to open up air sacs and facilitate gas exchange.
Necropsy revealed the presence of granulomas in the air sacs and/or lungs in 4 of 5 falcons and in 4 of 5 pigeons in the high dosage group.
The creatures' buoyancy decreases because water pressure squeezes their bodies into a smaller volume and flattens air sacs in their lungs.
LiquiVent is an oxygen carrying "liquid ventilation" drug administered directly into the lungs to open air sacs and facilitate gas exchange.
4,6) Metastasis to the lungs occurs by a vascular route rather than direct implantation, since contact is prevented by the air sacs.