Abbildung 1: Schematic representation of the urothelial/suburothelial layer of
the bladder wall. The urothelium has a surface layer of umbrella cells with basal and intermediate cells below. This is separated by a basement membrane from a suburothelial layer that contains blood vessels, small unmyelinated and myelinated fibres, as well as a syncytium of myofibroblasts. Many of these cells are concentrated towards the urothelial layer.