File:DaviesHarding1944 fig01.jpg

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Fig 1. Ovum and Endometrium

Operculum, consisting of fibrin and leucocytes permeated by plasmoditrophoblast, is seen in upper part of photograph. Fibrinous wisp projects into mouth of gland on left. No epithelium on surface of operculum. Sprouts of trophoblast seen penetrating stratum compactum below ovum. Maternal red-blood corpuscles seen in lucunae of plasmoditrophoblast to left of chorionic vesicle. Primitive mesoblast shown permeating chorionic vesicle between cytotrophoblast. and thin exocoelomic membrane. Of the two cavities inside the chorionic.vesicle, the upper, larger one is the exocoelomic vesicle (primitive yolk sac), with the endodermal plate of cubical cells forming its lower wall.

The lower, smaller cavity in the amniotic cavity; in the picture its upper wall is formed by the columnar cells of the ectodermal disc. The endometrium adjacent to the trophoblast shows no zone of necrosis. x 90.

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Reference

Davies F. and Harding HE. A Human ovum nine to ten days old. (1944) BJOG: An International Journal of Obstetrics & Gynaecology 51(3): 225-230.

Cite this page: Hill, M.A. (2024, April 27) Embryology DaviesHarding1944 fig01.jpg. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/File:DaviesHarding1944_fig01.jpg

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current19:05, 5 August 2016Thumbnail for version as of 19:05, 5 August 2016979 × 1,000 (241 KB)Z8600021 (talk | contribs)
19:03, 5 August 2016Thumbnail for version as of 19:03, 5 August 20161,200 × 1,636 (438 KB)Z8600021 (talk | contribs)Fig 1. Ovum and endometrium. Operculum, consisting of fibrin and leucocytes permeated by plasmoditrophoblast, is seen in upper part of photograph. Fibrinous wisp projects into mouth of gland on left. No epithelium on surface of operculum. Sprouts of t...

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