Tags: Anatomical Structure, Embryology.
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.
Tags: Anatomical Structure, Embryology.
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.
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