File:Hertig1956 fig45.jpg

Fig. 45.

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.

45 A 13-day ovum with a yolk-sac and beginning villi. Note undulating margin of chorionic cavity as the extraembryonic mesoblast forms shallow, broad cores of the villi. Also note yolk-sac formzition with remnants of the disrupted transitory exocoelomic membrane lying in the chorionic cavity ventral to the embryo. Note further the early decidual reaction imniedititely around the ovum. Carnegie 8672, Section 11-3-2. 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, April 27) Embryology Hertig1956 fig45.jpg. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/File:Hertig1956_fig45.jpg

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