loading...| Preferred Name |
air sac |
| Synonyms |
sacci pneumatici psotcranial air sac |
| Definitions |
Any of the membranous air-filled extensions of the lungs of birds, which increase the efficiency of gaseous exchange in the lungs. Three distinct sets of organs perform respiration-the anterior air sacs (interclavicular, cervicals, and anterior thoracics), the lungs, and the posterior air sacs (posterior thoracics and abdominals). The posterior and anterior air sacs, typically nine, expand during inhalation. Air enters the bird via the trachea. Half of the inhaled air enters the posterior air sacs, the other half passes through the lungs and into the anterior air sacs. Air from the anterior air sacs empties directly into the trachea and out the bird's mouth or nares. The posterior air sacs empty their air into the lungs. Air passing through the lungs as the bird exhales is expelled via the trachea. Some taxonomic groups (Passeriformes) possess 7 air sacs, as the clavicular air sacs may interconnect or be fused with the cranial thoracic air sacs[WP] |
| ID |
http://purl.obolibrary.org/obo/UBERON_0009060 |
| comment |
Three distinct sets of organs perform respiration-the anterior air sacs (interclavicular, cervicals, and anterior thoracics), the lungs, and the posterior air sacs (posterior thoracics and abdominals). The posterior and anterior air sacs, typically nine, expand during inhalation. Air enters the bird via the trachea. Half of the inhaled air enters the posterior air sacs, the other half passes through the lungs and into the anterior air sacs. Air from the anterior air sacs empties directly into the trachea and out the bird's mouth or nares. The posterior air sacs empty their air into the lungs. Air passing through the lungs as the bird exhales is expelled via the trachea. Some taxonomic groups (Passeriformes) possess 7 air sacs, as the clavicular air sacs may interconnect or be fused with the cranial thoracic air sacs[WP] |
| database_cross_reference |
SCTID:49081009 NCIT:C120926 Wikipedia:Bird_anatomy#Respiratory_system MESH:D000400 |
| definition |
Any of the membranous air-filled extensions of the lungs of birds, which increase the efficiency of gaseous exchange in the lungs. |
| depicted by |
http://upload.wikimedia.org/wikipedia/commons/f/f2/BirdRespiration.svg |
| has exact synonym |
sacci pneumatici |
| has related synonym |
psotcranial air sac |
| has_obo_namespace |
uberon |
| id |
UBERON:0009060 |
| label |
air sac |
| notation |
UBERON:0009060 |
| only in taxon | |
| part_of | |
| prefLabel |
air sac |
| treeView | |
| subClassOf |