part_of part of part of external ectoderm (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 EHDAA2:0001968 EHDAA:1494 EHDAA:350 EHDAA:4784 EHDAA:4790 EHDAA:4796 EHDAA:7860 EMAPA:16096 FMA:87656 UBERON:0000076 UMLS:C1515087 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) uberon surface (external) ectoderm surface ectoderm The surface (external) layer of ectoderm which begins to proliferate shortly after separation from the neuroectoderm. unilaminar epithelium embryo ectoderm embryonic tissue