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primitive knot

См. также в других словарях:

  • 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 — n a knob of cells at the anterior end of the primitive streak that is the point of origin of the embryonic head process see TAIL BUD * * * see Hensen s node …   Medical dictionary

  • 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

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