Development of the pulmonary vein in the American alligator (Alligator mississippiensis)

The Anatomical Record
L M Kutsche, L H Van Mierop

Abstract

The origin of the embryonic common pulmonary vein in terrestrial vertebrates is still uncertain. Most earlier studies in nonhuman embryos describe the vein as entering the sinus venosus. The currently prevailing view, however, based largely on the study of human material, is that the embryonic common pulmonary vein is associated with the left atrium from its inception. We recently observed the pulmonary vein entering the sinus venous part of the right atrium in several normal dog embryos of a stage comparable to horizon XIV in man (Streeter: Contrib. Embryol. Carnegie Inst. Wash., 31:53, 1945). In slightly older specimens the vein entered the left atrium just to the left of septum primum. This observation, and the fact that some atrial septal and pulmonary venous anomalies in man still await a plausible pathogenetic explanation, stimulated a restudy of the origin of the vein. The alligator was used because we already had prepared a large number of closely graded serially sectioned embryos for other purposes. Wax plate reconstructions clearly showed that the common pulmonary vein entered the left side of the sinus venosus. With the formation of the atrial septum, this part of the sinus venosus is "pinched off" and becomes incorp...Continue Reading

References

Feb 1, 1966·The Anatomical Record·W O Sack
Jan 1, 1951·Journal of Morphology·V HAMBURGER, H L HAMILTON

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Citations

Jul 13, 2002·The Journal of Experimental Zoology·Lorenzo Alibardi, Roger H Sawyer
Mar 26, 2011·Developmental Dynamics : an Official Publication of the American Association of Anatomists·Maike Jahr, Jörg Männer
Oct 20, 2018·The Anatomical Record : Advances in Integrative Anatomy and Evolutionary Biology·Bjarke JensenAntoon F M Moorman
Mar 1, 1989·The Anatomical Record·M T PhillipsM L Kirby
Oct 1, 1994·American Journal of Medical Genetics·S BleylK Ward
Apr 22, 2016·American Journal of Physiology. Regulatory, Integrative and Comparative Physiology·Kevin B TateDane A Crossley

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