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Transition zone

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.

Fig. 21. Heuser et al., 1945.

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Keywords: decidual cells, syncytium, transition zone, trophoblastic shell

Source: The Virtual Human Embryo.