File:Hertig1956 fig47.jpg

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Fig. 47.

Sections at low-power magnification of the three 13-day ova of Horizon VI shown on plate 7. They are characterized by primitive unbranched villi and a distinct yolk-sac.


47 A 13-day ovum with unbranched villi and yolk~s:ie. Note remnant of exocoelomic cavity at abembryonic pole of chorionic cavity, many villi and evidence of more active circulation within the lacunar (now properly termed. intervillous) space. Note also the distended and blood-filled gland at the base of the ovum and the coagulated plasma (“Schlussconguluni” of Peters) at the embryonic pole. This maternal blood and plasma, leaking out from the intervillous space, is continuous with the gross blood clot seen in figure 43. Numerous detached darkly staining syncytial giant cells are scattered among the decidual cells immediately surrounding the ovum. Carnegie 7801, Section 12-1-1. X 35.


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Reference

Hertig AT. Rock J. and Adams EC. A description of 34 human ova within the first 17 days of development. (1956) Amer. J Anat., 98:435-493.


Cite this page: Hill, M.A. (2024, May 24) Embryology Hertig1956 fig47.jpg. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/File:Hertig1956_fig47.jpg

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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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