part of epithelial cell adult epithelial cell adult proventriculus epithelium adult proventriculus epithelial cell 2021-10-01T12:27:21Z Cell of the epithelium lining the adult proventriculus. These cells varies in height from low cuboidal in the inner layer to tall columnar in parts of the intermediate and outer layers (King, 1988). FBbt:00058282 fly_anatomy.ontology