File:Hertig1956 fig34.jpg

Fig. 34.

High-power views of the germ discs of the five 11- to 12-day ova of Horizon Vc illustrated previously on plates 4 and 5.

34 The germ disc and anmion of an 11-day ovum. Note the orderly arrangement of cylindrical vacuolated ectodermal cells, beneath which is the irregularly arranged layer of vacuolated and foamy-appearing polyhedral cells of the endoderm. Dorsal to the germ disc is the amnion, delaminated in situ from the overlying cytotrophoblast and attached to the peripheral margin of the ectoderm. Note a. few mesoblasts also of cytotrophoblastic origin external to the amnion and merging with those at the junction of the endodermal plate and the exocoelomic membrane. Carnegie 7699, Section 8-5-3. X 300.

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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 fig34.jpg. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/File:Hertig1956_fig34.jpg

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