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Endometrium with eggcell (40X)

Microimage
Chorionic villi and chorionic cavity. Image copyright: University of Oslo, CC BY-NC-ND 4.0. (Tissue stain: H+E).

This is a close-up image of the egg. The cavity in the middle is the chorionic cavity. From its edges, the chorionic villi arise, and they can be seen as almost round structures. You can also see decidua which consists of transformed endometrium which forms the maternal part of the placenta. 

Published July 19th 2019, updated December 6th 2019.