Embryo 7802 - Stage 7
Fig. 21. Heuser, Rock and Hertig, 1945.
A part of the border zone from the section shown in figures 16 and 17. In the lower edge of the picture a segment of the trophoblastic shell (Cyto.) is seen. Above it the transition zone contains characteristic decidual cells and detached bits of the syncytium. Section 428.
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