Primitive groove 5025837 163303673 2007-10-09T11:26:45Z SmackBot 433328 Date/fix the maintenance tags or gen fixes {{Confusing|date=December 2006}} {{Infobox Embryology | Name = Primitive groove | Latin = | GraySubject = 6 | GrayPage = 47 | Image = Gray14.png | Caption = Surface view of embryo of [[Hylobates concolor]]. The [[amnion]] has been opened to expose the [[embryonic disk]]. | Image2 = | Caption2 = | System = | CarnegieStage = 9 | Precursor = | GivesRiseTo = | MeshName = | MeshNumber = | DorlandsPre = g_12 | DorlandsSuf = 12402766 | }} A shallow groove, the '''primitive groove''', appears on the surface of the [[primitive streak]], and the anterior end of this groove communicates by means of an aperture, the [[blastophore]], with the [[yolk-sac]]. ==External links== * {{EmbryologySwiss|hdisqueembry/triderm02}} {{Gray's}} {{Embryology}} [[Category:Embryology]] {{developmental-biology-stub}}