Reviewer 2

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  • 18 Hr Whole MountCells in area opaca (Blood islands concentrated lateral and caudal to body of embryo)Hensen’s node- most anterior portion of the primitive streak
  • 18 Hr Whole Mount
  • Intersomitic furrowEncircled blood islands  blood cells and vesselsProamnion – not yet migrated with mesoderm maybe above or lateral
  • Reviewer 2

    1. 1. 3 2 1 – Head Process 2 – Head Fold1 3 – Proamnion 5 4 – Area Opaca 4 5 – Area Pellucida
    2. 2. Hensen’s NodePrimitive PitPrimitive GroovePrimitive RidgeArea Pellucida
    3. 3. Anterior NeuroporeHead FoldNeural GrooveNeural FoldHead foldSomitesUnsegmented MesodermHensen’s Node

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