air sac


Also found in: Dictionary, Thesaurus, Medical, Wikipedia.
Related to air sac: bronchiole

air sac

[′er ‚sak]
(geology)
(invertebrate zoology)
One of the large, thin-walled structures associated with the tracheal system of some insects.
(vertebrate zoology)
In birds, any of the small vesicles that are connected with the respiratory system and located in bones and muscles to increase buoyancy.
References in periodicals archive ?
Tracheal endoscopy revealed an obstruction of approximately 90% of the tracheal lumen, in addition to mild suspected aspergillosis of the air sacs.
fumigatus was isolated from trachea, lung, air sacs and liver in all birds in the group (2) and could not be isolated from other groups (Table 1).
Overall, there is considerable inter- and, in part, intraspecific variation in air sac anatomy and the pneumatization of bones.
Sans his air sac, the 365-pound orangutan still had pneumonia and scarred lung tissue that made it hard to breathe in the dust kicked up by massive zoo construction.
Histologically, within the air sacs and the air sac walls, multiple longitudinal and cross sections of adult male and female nematodes were observed.
To find out how having an air sac changed the sounds produced, Dr de Boer created plastic models of the mouth, tongue and throat and forced air down them to produce different vowel sounds.
Additionally, administration of amphotericin B, as a nebulization agent, often is recommended, especially for cases with significant air sac disease.
They introduced a variety of nano-scaled particles (a nanometer is one-billionth of a meter) into the air sac channel.
The next morning, a tracheoscopy was performed on the duck while it was under general anesthesia as described above; however, the gas anesthetic agent was administered via the air sac cannula after face mask induction.
The opening above the eye was produced by an air sac within the skull that removed bone where it was not needed," said Carr.
Key words: synovial sarcoma, fracture-associated sarcoma, intramedullary pin, air sac metastasis, avian, lovebird, Agapornis roseicollis
Neoplasms reported in this area include lymphosarcoma, thyroid carcinoma or adenoma, thymoma, myelolipoma, undifferentiated spindle cell sarcoma, and air sac carcinoma.