Embryonic Structure
primitive node
prim·i·tive node
Definitions related to primitive node:
  • Region of primitive streak at the cranial end.
    Foundational Model of Anatomy
    University of Washington, 2017
  • The small circular, localized expansion of the cranial end of the primitive streak, which is centered around the primitive pit, and is where gastrulation takes place.
    NCI
    U.S. National Cancer Institute, 2021
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