part of develops from adult posterior midgut epithelium enterocyte of posterior adult midgut epithelium FBbt:00007037 A large, polyploid, cuboidal or low-columnar epithelial cell of the adult posterior midgut. It has its nucleus in the middle and a mass of microvilli (brush border) on its apical surface. On its basal side, extensive infoldings of the plasma membrane form a labyrinth which fills the lower half of the cell. It is attached to adjacent enterocytes by smooth septate junctions. pEC fly_anatomy.ontology enterocyte adult posterior midgut adult midgut enterocyte enteroblast of posterior adult midgut epithelium