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 ?
Grossly the air sacs were opaque, severely thickened, and red with multifocal to coalescing white to yellow shiny raised plaques with gray to green, sometimes fuzzy, centers, 0.2-1 cm in diameter.
Key words: synovial sarcoma, fracture-associated sarcoma, intramedullary pin, air sac metastasis, avian, lovebird, Agapornis roseicollis
It inflames these air sacs so they produce mucus, which pools inside them.
(7) As members of the family Cyclocoelidae, these flukes typically inhabit the air sacs of birds and include Bothrigaster variolaris, (5) Circumvitellatrema momota, (1,2) Cyclocoelum mutabile, (6) Neoallopyge americanensis, (4) and Szidatitrema yamagutii?
Aroyan of the University of California, Santa Cruz, and his co-workers also note that a dolphin's skull-supported air sacs appear to act together as an acoustical mirror, focusing sound from this source into a highly directed beam that emerges from the dolphin's forehead.
The autoimmune disease, in which the body attacks itself, causes inflammation and thickening of the tiny air sacs in the lungs.
Emphysema involves chronic irritation of the bronchial tubes and irreversible damage to the tiny air sacs in the lungs where the exchange of oxygen and carbon dioxide takes place.
Anti-Salmonella immunohistochemistry (IHC) stained the cytoplasm of macrophages or free in the liver (5/5), spleen (5/5), lungs (4/5), kidneys (2/2), small intestine mucosa (2/2), cecum (1/1), bone marrow (1/1), air sacs (1/ 1), and ovary (1/1).
The disease causes inflammation and thickening of air sacs in the lungs.
Chemicals in cigarette smoke can slowly eat away the lungs' tiny air sacs and cause deadly emphysema; so can one of the body's own enzymes, neutrophil elastase.
At necropsy, numerous sexually dimorphic, 4.4-40.5-cm adult Monopetalonema alcedinis nematodes were found tightly wound within the coelomic cavity between organs and completely filling the caudal thoracic and abdominal air sacs. Abundant, 30-60-[micro]m-diameter, larvated, thick-walled ova were found in the bronchi and parabronchi, within the mesentery, and in the serosa of multiple coelomic organs.
Laboratory investigations revealed pure cultures of M iowae in the gut as well as in the sinus and air sacs. Although other organisms, such as coccidia, Trichomonas, Escherichia coli, Clostridium perfringens, and Aspergillus species were detected, the similarity of the disease with that seen in turkeys infected with M iowae strongly suggests that this mycoplasma may be the primary pathogen here.
Photo: A scanning electron micrograph showsthe destructive erosion of the lung's air sacs seen in emphysema patients.
Further complications, such as damage to the air sacs or bleeding, predominantly occurred in subsequent endoscopies.