part_of starts_at ends_at muscle layer of pelvic urethra of female smooth muscle layer of pelvic urethra of female EMAPA:36116 The smooth muscle layer of pelvic urethra of female (TS:28-28) is the smooth muscle layer towards the outside of the pelvic urethra. Part of the pelvic urethra, part of the urethra of female. Marked by proteins expressed by smooth muscle cells, such as smooth muscle alpha actin (Acta2). anatomical_structure smooth muscle of urethra TS28