develops_from multilaminar epithelium somite dermomyotome AAO:0010572 AEO:0000214 EHDAA2:0003259 EMAPA:31109 Epithelial sheet on the external surface of the somite that gives rise to trunk, muscle and dermis. Within the dermomyotome there is also a medio-lateral difference. The central region makes dermis, the mesenchymal connective tissue of the back skin. The medial region (closest to neural tube) makes epaxial muscle, and the lateral region (furthest from neural tube) makes hypaxial muscle[http://www.ncbi.nlm.nih.gov/bookshelf/br.fcgi?book=eurekah&part=A66768]. Epithelial sheet on the external surface of the somite that gives rise to trunk, muscle and dermis.[TAO] FMA:295654 Portion of somites that gives rise to dermis and muscles.[AAO] TAO:0001513 The bilaminar epithelium formed from the myotome and dermatome. Thus, representatives of the agnathan vertebrates, chondrichthyans, and sarcopterygians all have a layer of undifferentiated cells external to the embryonic myotome. In the amniotes, this external cell layer is the dermomyotome. The simplest interpretation of the similar position, morphology, and lack of myosin labeling is that a dermomyotome epithelium is a shared, ancestral vertebrate characteristic.[well established][VHOG] UBERON:0004290 UMLS:C1511786 VHOG:0000676 ZFA:0001513 all but the sclerotome of a mesodermal somite; the primordium of skeletal muscle and, perhaps, of the dermis. dermamyotome dermomyotomes uberon meso-epithelium transitional anatomical structure