Embryo 7801 - Stage 6 | Fig. 11. Heuser,
Rock and Hertig, 1945. |
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A patch of endodermal cells (End.) which forms a cap over the end of the cavity of the yolk sac is seen in the lower part of this figure. There is no definite line of demarcation between the patch of endoderm and the dense tissue which extends to the posterior wall fo the amnion. Section 156. | ||||
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