The structure of the gas bladder of the spotted gar, Lepisosteus oculatus

Journal of Morphology
J M IcardoGiacomo Zaccone

Abstract

We report here on the macroscopic, light microscopic, and electron microscopic structure of the gas bladder (GB) of the spotted gar, Lepisosteus oculatus. The GB opens into the pharynx, dorsal to the opening of the oesophagus, through a longitudinal slit bordered by two glottal ridges. Caudal to the ridges, the GB is an elongated sac divided into a central duct and right and left lobes. The lobes are formed by a cranio-caudal sequence of large air spaces that open into the central duct. The structure of the GB is that of a membranous sac supported by a system of septa arising from the walls of a central duct. The septa contain variable amounts of striated and smooth muscle might function to maintain the bladder shape and in providing contractile capabilities. The presence of muscle cells, nerves, and neuroepithelial cells in the wall of the GB strongly suggests that GB function is tightly regulated. The central duct and the apical surface of the thickest septa are covered by mucociliated epithelium. Most of the rest of the inner bladder surface is covered by a respiratory epithelium which contains goblet cells and a single type of pneumocyte. These two cell types produce surfactant. The respiratory barrier contains thick areas ...Continue Reading

References

Oct 1, 1989·The Anatomical Record·D W ScheuermannM H de Groodt-Lasseel
Jan 1, 1970·Zeitschrift für Zellforschung und mikroskopische Anatomie·R E Brooks
Apr 1, 1997·Microscopy Research and Technique·L Goniakowska-Witalińska
Mar 10, 2001·Respiration Physiology·J Widdicombe
May 23, 2001·Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology·S F PerryJ E Remmers
Mar 1, 2006·Journal of Experimental Zoology. Part A, Comparative Experimental Biology·Giacomo ZacconeSalvatore Fasulo
Mar 14, 2007·Respiratory Physiology & Neurobiology·William K Milsom, Mark L Burleson
Apr 9, 2008·Annals of Anatomy = Anatomischer Anzeiger : Official Organ of the Anatomische Gesellschaft·M Jaroszewska, K Dabrowski
Jan 6, 2009·Acta histochemica·Giacomo ZacconeSalvatore Fasulo
Feb 5, 2013·Journal of Morphology·Sarah LongoAmy R McCune

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Citations

Jun 2, 2016·Journal of Experimental Zoology. Part B, Molecular and Developmental Evolution·Simona RimoldiKonrad Dabrowski
Jul 29, 2016·American Journal of Physiology. Regulatory, Integrative and Comparative Physiology·Warren W BurggrenCarlos Alfonso Alvarez González
Jan 23, 2019·Integrative and Comparative Biology·Robert L Cieri
May 12, 2015·Annals of the New York Academy of Sciences·Michael G JonzGiacomo Zaccone
Oct 10, 2020·Journal of Morphology·José M IcardoGiacomo Zaccone

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