Primitive groove

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Primitive groove
Gray14.png
Surface view of embryo of Hylobates concolor. The amnion has been opened to expose the embryonic disk.
Details
Latin sulcus primitivus
Carnegie stage 9
Identifiers
Gray's p.47
Dorlands
/Elsevier
g_12/12402766
Anatomical terminology

A shallow groove, the primitive groove, appears on the surface of the primitive streak, and the anterior end of this groove communicates by means of an aperture, the blastophore, with the yolk-sac.

External links[edit]

This article incorporates text from a public domain edition of Gray's Anatomy.