Definition of Lung sac. Meaning of Lung sac. Synonyms of Lung sac

Here you will find one or more explanations in English for the word Lung sac. Also in the bottom left of the page several parts of wikipedia pages related to the word Lung sac and, of course, Lung sac synonyms and on the right images related to the word Lung sac.

Definition of Lung sac

Lung sac
Note: In all air-breathing vertebrates the lungs are developed from the ventral wall of the esophagus as a pouch which divides into two sacs. In amphibians and many reptiles the lungs retain very nearly this primitive saclike character, but in the higher forms the connection with the esophagus becomes elongated into the windpipe and the inner walls of the sacs become more and more divided, until, in the mammals, the air spaces become minutely divided into tubes ending in small air cells, in the walls of which the blood circulates in a fine network of capillaries. In mammals the lungs are more or less divided into lobes, and each lung occupies a separate cavity in the thorax. See Respiration. Lung fever (Med.), pneumonia. Lung flower (Bot.), a species of gentian (G. Pneumonanthe). Lung lichen (Bot.), tree lungwort. See under Lungwort. Lung sac (Zo["o]l.), one of the breathing organs of spiders and snails.

Meaning of Lung sac from wikipedia

- the lungs contain approximately 2,400 kilometres (1,500 miles) of airways and 300 to 500 million alveoli. Each lung is enclosed within a pleural sac of...
- system of air sacs in their ventilation system. The air sacs work to produce a unidirectional flow where air enters and exits the lung at the same rate...
- cavity"), also known as an air sac or air space, is one of millions of hollow, distensible cup-shaped cavities in the lungs where pulmonary gas exchange...
- egg sacs, which maintain a fairly constant humidity level. In some species, the females die afterwards, but females of other species protect the sacs by...
- space is the potential space between the pleurae of the pleural sac that surrounds each lung. A small amount of serous pleural fluid is maintained in the...
- surface is internalized as linings of the lungs. Gas exchange in the lungs occurs in millions of small air sacs; in mammals and reptiles, these are called...
- body wall force the air back and forth between the lungs and vocal sac. The development of the vocal sac is different in most species, however they mostly...
- lining of the lung's air sacs and the blood vessels that surround them—across a porous, flexible boundary. Air is delivered to the lung lining cells,...
- affecting the interstitium (the tissue) and space around the alveoli (air sacs) of the lungs. It concerns alveolar epithelium, pulmonary capillary endothelium...
- are the two flattened sacs ensheathing each lung, locally appearing as two opposing layers of serous membrane separating the lungs from the mediastinum...