File:Hertig1956 fig40.jpg

Fig. 40.

Three ova of Horizon VI about 13 days of age cliaraeterized by primitive villi and a distinct yolk-sac. Low power views of mid sections of each of these ova are shown on plate 8.

40 Medium-power view of one of the middle sections of the ovum seen in figure 39 to show detail of the embryo and adjacent trophoblast-. Note small double-layer yolk-sac. No villi are seen in this photograph but they are evident at tho ahembryonic pole as shown in figure 45. Note increase in size of amniotic cavity. Its continuity with the trophoblast may be evidence of continuing mnniogenesis from this tissue. Vacuoles are not apparent in the ectoderm but are present in the endoderm. Carnegie 8672, Section 11-3-2. X 100.

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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 20) Embryology Hertig1956 fig40.jpg. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/File:Hertig1956_fig40.jpg

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