Fig. 7. Heuser,
Rock and Hertig, 1945.
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| Embryo 7801 - Stage 6 | Fig. 7. Heuser,
Rock and Hertig, 1945. |
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| The germ disk in the region of the primitive streak reveals a small slitlike pit in the middorsal plane. The primitive streak in this and the following section is seen at its maximum size. Section 152. | |
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