EMBRYONIC DEVELOPMENT & STEM CELL COMPENDIUM
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Primitive Streak >

Primitive Groove


PrS.PrG
The primitive groove is a furrow in the posterior region of the embryonic (primordial) disc that results from the active involution of cells forming the primitive streak the groove also marks the cephalocaudal axis of the embryo.

Appears on day 15 in human
Primitive Groove
Multiple Ancestors Single Ancestor No Descendants Develops from Part of Parent
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