Lexic.us

Definition of Air sac

1. Noun. A tiny sac for holding air in the lungs; formed by the terminal dilation of tiny air passageways.

2. Noun. Any of the thin-walled extensions of the tracheae of insects.

3. Noun. Any of the membranous air-filled extensions of the lungs of birds.

Medical Definition of Air sac

1. Thin-walled sacs or spaces which function as a part of the respiratory system in birds, fishes, insects, and mammals. The sacs are filled with air and connected with the air passages of the lungs; an air cell. Source: Websters Dictionary (04 Jul 1999)

Lexicographical Neighbors of Air Sac

air pumps air purifier air quality maintenance area air quote air quotes air rage air raid air raid siren air raids air reconnaissance

air resistance air ride air rifle air rifles air rights air sac (current term) air scooter air scooters air search radar air shaft

air shed air sheds air ship air ships air show air shower air shows air sick air sickness air sign

Literary usage of Air sac

Below you will find example usage of this term as found in modern and/or classical literature:

1. A Text-book of Zoology by Thomas Jeffery Parker, William Aitcheson Haswell (1921)
"The lungs with the aponeurosis or pleura p ib.l aperture of anterior thoracic air-sac; br. principal V 5' r , y 1 ? uP-h posterior end of the trachea, ..."

2. The Development of the Chick: An Introduction to Embryology by Frank Rattray Lillie (1908)
"just beneath the peritoneum. clavicular air-sac, o, Anterior thoracic _° 1, ... 4, Posterior thoracic air-sac, to expand into the abdominal 5, ..."

3. Respiration by John Scott Haldane (1922)
"Hence the extra proportion of CO2 extracted from the blood in the air-passage alveoli is practically taken from the air-sac alveoli, and this is why the ..."

4. The Scientific Memoirs of Thomas Henry Huxley by Thomas Henry Huxley, Michael Foster (1902)
"Hence the air-sac in front of the anterior intermediate in Apteryx must be the homologue ... air-sac does not extend beyond the front margin of the sternum, ..."

5. Comparative Anatomy of Vertebrates by Robert Wiedersheim (1907)
"The posterior thoracic air-sac presents the simplest and most constant relations, and never communicates with any of the neighbouring chambers, ..."

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