Embryonic disk
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| Embryonic disk | ||
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| Section through embryonic disk of Vespertilio murinus. | ||
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| Surface view of embryo of a rabbit. (After Kölliker.) arg. Embryonic disk. pr. Primitive streak. | ||
| Gray's | subject #6 47 | |
| Carnegie stage | 4 | |
| Dorlands/Elsevier | d_22/12300248 | |
The floor of the amniotic cavity is formed by the embryonic disk (or embryonic disc) composed of a layer of prismatic cells, the embryonic ectoderm, derived from the inner cell-mass and lying in apposition with the entoderm.
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