File:Odgers1935 plate01.jpg

From Embryology

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Plate I

Figs. 1-4. These microphotographs of sections of the aurieles in a 5-mm. embryo ( x 60) show in fig. I the myocardium spreading into the subendocardial space from the dorsal wall to form the septum primum. Figs. 2-4 are photographs of alternate sections next below this and in them a lacuna appears in the myocardial proliferation, ultimately splitting this into two. The left limb forms the septum primum, the right limb the left venous valve, the connection between the two persisting as the septum spurium.

Fig. 5 is a microphotograph of the same heart 11 sections below the last. This shows the right valve as being formed by the coaptation of the anterior wall of the right horn of the sinus venosus with the posterior wall of the auricle. The left venous valve is seen as a small projection immediately to the left and slightly anterior to the right valve.


Odgers PNB. The formation of the venous valves, the foramen secundum and the septum secundum in the human heart. (1935) J. Anat., 69: 412-422. PMID 17104548

Cite this page: Hill, M.A. (2024, June 13) Embryology Odgers1935 plate01.jpg. Retrieved from

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© Dr Mark Hill 2024, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G

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