primitive knot
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Primitive knot — Latin nodus primitivus Gray s subject #6 47 Days 17 The primitive knot (or primitive node) is the organizer for gastrulation in vertebrates … Wikipedia
primitive knot — noun : a knob of cells at the anterior end of the primitive streak that is the point of origin of the embryonic head process see end bud 2 … Useful english dictionary
primitive knot — Hensen s node … The new mediacal dictionary
primitive pit — n a depression immediately behind the primitive knot in which the primitive groove ends * * * a depression in the primitive node of the primitive streak at the cranial end of the primitive groove; it may open abnormally into a neurenteric canal … Medical dictionary
primitive groove — n a depression or groove in the epiblast of the primitive streak that extends forward to the primitive knot * * * a lengthwise median furrow in the primitive streak of the embryo; in human embryos it is clearly visible during the third week.… … Medical dictionary
Primitive streak — Infobox Embryology Name = Primitive streak Latin = GraySubject = 6 GrayPage = 47 Caption = Surface view of embryo of a rabbit. arg. Embryonic disk. pr. Primitive streak. Caption2 = Width = 215 System = CarnegieStage = 6b Days = 15 Precursor =… … Wikipedia
primitive node — a mass of cells at the cranial end of the primitive streak, related to the organization of an embryo. Called also primitive knot … Medical dictionary
primitive groove — noun : a depression or groove in the epiblast of the primitive streak that extends forward to the primitive knot … Useful english dictionary
primitive pit — noun : a depression immediately behind the primitive knot in which the primitive groove ends … Useful english dictionary
knot — 1. An intertwining of the ends of two cords, tapes, or sutures, in such a way that they cannot easily become separated; or a similar twining or infolding of a cord in its continuity. 2. In anatomy or pathology, a node, ganglion, or circumscribed… … Medical dictionary
