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|21:11, 4 October 2012||Retinal Disc to form Optic Cup at Carnegie stage 14.jpg (file)||400 KB||At Carnegie stage 14, the retinal disc becomes invaginated to form the optic cup. Lens Pit can also be seen forming. Contour forming slowly. Based upon images by: R O'Rahilly The prenatal development of the human eye. Exp. Eye Res.: 1975, 21(2);93-112 F||1|
|21:02, 4 October 2012||Optic cup at carnegie stage 17 .jpg (file)||297 KB||Optic Cup at Carnegie Stage 17. Lens Cavity appears as a small moon shaped slit within the developing lens as the primary fibers slowly fill up cavity. The retina is beginning to differentiate by the formation of a neuroblastic layer. Based upon images||1|
|16:29, 7 August 2012||Critical stages of the development of the primitive streak in the chick embryo..png (file)||1.31 MB||Wnt 8c expression during formation of Koller's sickle and the primitive streak. (A, B) At stage HH1  Wnt8c (A) and Chordin (B) RNAs are expressed in the Area Opaca. At this time the embryo is growing and the epiblast increases in size as shown by the||1|