Primitive pit
The primitive pit is a depression in the center of the primitive knot, connecting to the notochord. It consists of part of the primitive streak.
| Primitive pit | |
|---|---|
 Surface view of embryo of Hylobates concolor. The amnion has been opened to expose the embryonic disk. (Primitive pit not labeled, but region is visible.) | |
| Anatomical terminology |
References
This article incorporates text in the public domain from the 20th edition of Gray's Anatomy (1918)
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