The elements of experimental embryology The elements of experimental embryology elementsofexperi00huxl Year: 1963 APPENDIX 489 isolated ectoderm (see figs. 13 and 219). This appears to be due largely to the formation of mesenchymatous vesicles containing fluid, which produce normal tension in the ectodermic vesicle. Fig. 219 Organisation of epidermis, a, wrinkled, irregular epidermis of axolotl exo- embryo not underlain by organiser; b, two-layered epithelium induced by pre- sence of underlying connective tissue and blood-cells. (From Holtfreter, .4ir/z. Entwmech. cxxix, 1933.) Neural form
The elements of experimental embryology The elements of experimental embryology elementsofexperi00huxl Year: 1963 APPENDIX 489 isolated ectoderm (see figs. 13 and 219). This appears to be due largely to the formation of mesenchymatous vesicles containing fluid, which produce normal tension in the ectodermic vesicle. Fig. 219 Organisation of epidermis, a, wrinkled, irregular epidermis of axolotl exo- embryo not underlain by organiser; b, two-layered epithelium induced by pre- sence of underlying connective tissue and blood-cells. (From Holtfreter, .4ir/z. Entwmech. cxxix, 1933.) Neural formations are never induced in such conditions, but are always formed if any of the ectoderm comes to be underlain by chorda-mesoderm. If only a narrow portion of chorda-mesoderm
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