external ectoderm http://upload.wikimedia.org/wikipedia/commons/1/1d/Ectoderm.png merge with non-neural. In vertebrates, the ectoderm has three parts: external ectoderm (also known as surface ectoderm), the neurectoderm (neural crest, and neural tube) surface (external) ectoderm EMAPA:16096 EHDAA2:0001968 EHDAA:4784 Wikipedia:External_ectoderm EHDAA:1494 surface ectoderm EHDAA:350 BTO:0006242 UBERON:0000076 (or external ectoderm) forms the following structures: Skin Epithelium of the mouth and nasal cavity saliavary glands, and glands of mouth and nasal cavity Enamel - as a side note dentin and dental pulp are formed from ectomesenchyme which is derived from ectoderm Epithelium of pineal and pituitary glands Lens and cornea of the eye Apical ectodermal ridge inducing development of the limb buds of the embryo. Sensory receptors in epidermis NCIT:C34309 UMLS:C1515087 EHDAA:4796 The surface (external) layer of ectoderm which begins to proliferate shortly after separation from the neuroectoderm. EHDAA:7860 EHDAA:4790 FMA:87656 unilaminar epithelium