Fig. 22. Heuser,
Rock and Hertig, 1945.
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| Embryo 7802 - Stage 7 | Fig. 22. Heuser,
Rock and Hertig, 1945. |
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| The section passes through the thickest part of the germ disk. Below it the front wall of the yolk sac is cut tangentially on the right side. There is an apparent blending between the endoderm and mesoderm. The cavity of the yolk sac (Y. S. Cav.) extends into the left side of the section. Section 443. | |
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