Linked Life Data

12473947

Source:http://linkedlifedata.com/resource/pubmed/id/12473947

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
5 Pt 1
pubmed:dateCreated
2002-12-10
pubmed:abstractText
The description of the evolution of Vertebrate lung is based on comparative anatomy and physiology, combined with phylogenetics. An air-breathing organ (ABO), in addition to gill respiration, appeared in fishes about 400 M years ago. It consisted of a single primitive lung ventilated by a buccal pump. This breathing system was adopted by the first terrestrial tetrapods, and is largely preserved in current amphibians. In the Amniotes, the buccal pulsing pump has been replaced with a costal aspiration pump. In mammals, this ABO evolved into a bronchoalveolar lung. In "Reptiles", the ABO is a partitioned lung with one or several cavities. It serves as a gas exchanger but also as an O(2) reserve, which allows for long periods of apnoea. In birds, the ABO is a tubular structure ventilated by unidirectional airflow. Such a breathing system allows for high rates of O(2) consumption. The diversity of structure and function of the Vertebrate lung should not be analysed as a progression of increasing complexity towards mammal lungs, but rather as diverse responses to varying environmental conditions and phylogenic constraints, and to the challenge of acquiring oxygen necessary for aerobic metabolism.
pubmed:language
fre
pubmed:journal
pubmed:citationSubset
IM
pubmed:status
MEDLINE
pubmed:month
Oct
pubmed:issn
0761-8425
pubmed:author
pubmed:issnType
Print
pubmed:volume
19
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
601-15
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
2002
pubmed:articleTitle
[Origin and evolution of the respiratory tract in vertebrates].
pubmed:affiliation
Laboratoire de Physiologie cellulaire respiratoire EMI 9937, Université Victor Segalen, Bordeaux 2, France.
pubmed:publicationType
Journal Article, English Abstract, Review