part of neurogenic region ventral neurectoderm P2 VenEc fly_anatomy.ontology vNR neuroectoderm ventral neurogenic region The ventrally/medially located ectodermal region of the trunk from which neuroblasts delaminate to form the ventral nerve cord and gnathal ganglia. This region becomes distinct during stage 8 when its cells become enlarged compared to those in the adjacent dorsal ectoderm. VenEc neurectoderm FBbt:00001061 FBbt:00000113 ventral ectoderm epithelium