7. transitional epithelium Description: multiple layers of cells Surface cells are dome-shaped Middle layers: cells are polyhedral Basal cells. cuboidal or columnar Locations: renal pelvis and calyces the ureter the urinary bladder etc7. transitional epithelium Description: multiple layers of cells. Surface cells are dome-shaped. Middle layers: cells are polyhedral Basal cells: cuboidal or columnar. Locations: renal pelvis and calyces,the ureter, the urinary bladder ,etc