Heart inflow tract of the African lungfish Protopterus dolloi

Journal of Morphology
José M IcardoYuen K Ip

Abstract

We report a morphologic study of the heart inflow tract of the African lungfish Protopterus dolloi. Attention was paid to the atrium, the sinus venosus, the pulmonary vein, and the atrioventricular (AV) plug, and to the relationships between all these structures. The atrium is divided caudally into two lobes, has a common part above the sinus venosus, and appears attached to the dorsal wall of the ventricle and outflow tract through connective tissue covered by the visceral pericardium. The pulmonary vein enters the sinus venosus and runs longitudinally toward the AV plug. Then it fuses with the pulmonalis fold and disappears as an anatomic entity. However, the oxygenated blood is directly conveyed into the left atrium by the formation of a pulmonary channel. This channel is formed cranially by the pulmonalis fold, ventrally by the AV plug, and caudally and dorsally by the atrial wall. The pulmonalis fold appears as a wide membranous fold which arises from the left side of the AV plug and extends dorsally to form the roof of the pulmonary channel. The pulmonalis fold also forms the right side of the pulmonary channel and sequesters the upper left corner of the sinus venosus from the main circulatory return. The AV plug is a lar...Continue Reading

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Citations

Apr 17, 2009·Development·Andrew D HoffmannIvan P Moskowitz
Sep 15, 2017·Journal of Anatomy·Andrea StephensonMauro Vaccarezza
Oct 20, 2018·The Anatomical Record : Advances in Integrative Anatomy and Evolutionary Biology·Bjarke JensenAntoon F M Moorman
Apr 29, 2005·Journal of Morphology·José M IcardoYuen K Ip
Jun 29, 2010·The Anatomical Record : Advances in Integrative Anatomy and Evolutionary Biology·José M IcardoYuen K Ip
May 8, 2019·Developmental Dynamics : an Official Publication of the American Association of Anatomists·Robert E Poelmann, Adriana C Gittenberger-de Groot
Nov 18, 2014·Journal of Anatomy·Desiderius M de BakkerBjarke Jensen
Oct 10, 2019·Evolution & Development·Bjarke JensenVincent M Christoffels
Dec 21, 2019·Biological Reviews of the Cambridge Philosophical Society·Warren BurggrenTobias Wang

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