Results 211 to 220 of about 11,727 (261)

Sources of carbon dioxide in penguin air sacs

American Journal of Physiology-Regulatory, Integrative and Comparative Physiology, 1985
CO2 tensions in the caudal air sacs of birds cannot be quantitatively predicted by current models of avian respiration, mainly because the contribution of neopulmonic parabronchial gas exchange has not been determined. To overcome this problem we studied penguins that have purely paleopulmonic lungs.
F L, Powell, S C, Hempleman
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Air sacs reduce energy costs for soaring birds

Nature
Bret W Tobalske
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On the origin of avian air sacs

Respiratory Physiology & Neurobiology, 2006
For many vertebrates the lung is the largest and lightest organ in the body cavity and for these reasons can greatly affect an organism's shape, density, and its distribution of mass; characters that are important to locomotion. In this paper non-respiratory functions of the lung are considered along with data on the respiratory capacities and gas ...
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Air Sacs In Ants (Hymenoptera, Formicidae)

1982
(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.
Wheeler, George C., Wheeler, Jeanette
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Air in the lesser sac

2016
Clinical History: A 60-year-old male, previously autonomous, was brought unconscious to the emergency department and an acute intra-cerebral hemorrhage was diagnosed on CT. Bloody drainage was also observed in the nasogastric tube. On upper endoscopy a deep bleeding ...
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Ultrastructure of the Abdominal Air Sac of the Fowl

Research in Veterinary Science, 1973
Summary Electron microscopy of the abdominal air sac of fowls revealed that the tissue is composed of 4 distinct cell types: flat mesothelial serosal cells on the peritoneal surface, flattened epithelial cells, and basal cells lining the air sac cavity, and fibroblasts and collagen between the two surfaces.
H C, Carlson, E C, Beggs
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Dorsal Air Sac Assay

2015
The dorsal air sac assay (DASA) is a simple and convenient in vivo assay to measure angiogenesis and angiogenesis inhibition by substances of interest. In the assay, tumor cells that release angiogenic factors are placed in a diffusion chamber that consists of a plastic or rubber ring covered with cellulose membrane filters on both sides.
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The Air Sacs of the Loon

The Auk, 1952
AT irregular intervals during the past 100 years, there have been reports on the methods of study, general structure, modifications, and functions of the avian respiratory system. Most of the work has been done with the Pigeon, Columbia livia (Muller, 1908; Gilbert, 1939) and the Chicken, Gallus gallus (Locy and Larsell, 1916; McLeod and Wagers, 1939).
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AIR SAC PARASITES OF THE GENUS Serratospiculum IN FALCONS

Journal of Wildlife Diseases, 1972
Nematodes of the genus Serratospiculum are common and usually innocuous inhabitants of the air sacs of several species of falcons. However, the abdominal and thoracic air sacs of a prairie falcon (Falco mexicanus) that died in respiratory distress were filled with hundreds of adult parasites.
F P, Ward, D G, Fairchild
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The Development of "Air Sac Disease"

Avian Diseases, 1961
The terms "air sac disease" and "chronic respiratory disease" (CRD) have been widely employed to designate a disease manifested by fibrinous pericarditis, perihepatitis, and thickening of the air sacs. It has been suggested that the disease had a very complex etiology since many agents have been isolated from accessions. Among the more important agents
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