Fig. 23. Heuser,
Rock and Hertig, 1945.
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| Embryo 7802 - Stage 7 | Fig. 23. Heuser,
Rock and Hertig, 1945. |
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| The head process (H.P.) is seen as a fairly well defined clump of cells in the middle part of the embryonic plate. There is some body mesoderm which blends with the extraembryonic layer above the lateral border of the yolk sac. Section 426. | |
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