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Morphology and histology of the swimbladder and infrastructure of respiratory epithelium in the air‐breathing catfish, Pangasius sutchi (Pangasiidae)
Author(s) -
Zheng W. B.,
Liu W. S.
Publication year - 1988
Publication title -
journal of fish biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.672
H-Index - 115
eISSN - 1095-8649
pISSN - 0022-1112
DOI - 10.1111/j.1095-8649.1988.tb05456.x
Subject(s) - biology , pangasius , catfish , histology , epithelium , anatomy , respiratory system , lung , pathology , toadfish , fishery , fish <actinopterygii> , medicine , genetics
The swimbladder of Pangasius sutchi is made up of fibrosa, collagenic fibre walls and mucosa; its walls extend into the lumen to form dense respiratory alveoli, with the inner surface covered by a highly vascularized respiratory epithelium. The thin epithelial cells have the structural characteristics and function of type I and type II cells of lung alveoli in higher mammals. These cells and the endothelial cells compose the barrier through which gases must pass in the exchange between blood and air. The study shows that the swimbladder of P. sutchi is an important accessory respiratory organ.