| The stem cell lines also retain the ability, throughout the culture, to differentiate into tissue-derived endoderm, mesoderm and ectoderm. |
| It is involved in mesoderm development and differentiation of the neural ectoderm into epidermoblasts and neuroblasts. |
| The branchial arches begin as cylindrical cores of mesenchyme sandwiched between continuous sheets of epidermal ectoderm and internal endoderm. |
| The somatopleure, which is close to the ectoderm, is involved in the formation of the lateral and ventral walls of the embryo. |
| The critical process depends upon whether the ectoderm can contact a condensate of specialized mesenchyme called the dermal papillae. |
| The mouth and pharynx are derived by a secondary infolding of superficial ectoderm called the stomodeum. |
