Embryo 7802 - Stage 7
Fig. 19. Heuser, Rock and Hertig, 1945.
A finger-like process of cytotrophoblast (Cyto.) is seen in this section growing centripetally through the chorionic mesoderm. A small crescentic mass of syncytium (Syn.) has differentiated on the tip of the process. The intervillous spaces are lined with syncytium which reveals a distinct "brush border." Section 204. X150.
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