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Fig. 461. Diagram to illustrate the simple tubular condition of the heart

(Drawn from Ecker-Ziegler model.)

The intermediate portion arches transversely from left to right, and then turns sharply forward into the anterior part of the loop. Slight constrictions make their appearance in the tube and divide it from behind forward into five parts, viz.: (1) the sinus venosus; (2) the primitive atrium; (3) the primitive ventricle; (4) the bulbus cordis, and (5) the truncus arteriosus (Figs. 461, 462). The constriction between the atrium and ventricle constitutes the atrial canal, and indicates the site of the future atrioventricular valves.

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Reference

Gray H. Anatomy of the human body. (1918) Philadelphia: Lea & Febiger.


Cite this page: Hill, M.A. (2024, May 23) Embryology Gray0461.jpg. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/File:Gray0461.jpg

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