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The Effects of Crowding and of Dispersal on the Cells
Experiments with pieces of anterior neural plate explanted with
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accumulation amphibian anlagen anurans apical arise attached auditory vesicles Axolotl eye rudiment basal sheet body cavity cellular changes Chapter choroid coat connexions cup shape cup-shaped days explantation depends develop into retina differentiation ectoderm ectomesenchyme effect embryo enchyme endoderm experimental experiments explants eye development eye rudiment fissure cavity formation gastrula gastrula ectoderm grafted head hemi-embryos Holtfreter inducing influence inner layer internal invagination iris isolated larval later layer of visual lens lens-ectoderm lens-forming material lenses Lopashov medium ment mesenchyme coat mesoderm nasal placodes neural crest neural folds neural plate neurula nucleus optic vesicle optic vesicle stage organs outer layer Pelobates period pigment epithelium pigment granules processes Rana arvalis Rana esculenta retina retinal layers rolling saline separated shown shows somites species Spemann Stroeva structure substances surface surrounded by mesenchyme thickness thin tissues Triturus turn into retina urodeles vessels visual cells wall whole embryos Zool