part_of starts_at ends_at muscle layer of prostatic urethra rhabdosphincter of male anatomical_structure The rhabdosphincter of male (syn: striated muscle layer of prostatic urethra) (TS:28-28) is the striated muscle layer towards the outside of the prostatic urethra. Part of the prostatic urethra, part of the urethra of male. Marked by proteins expressed by skeletal muscle cells, such as skeletal muscle alpha actin (Acta1). EMAPA:32269 striated muscle layer of prostatic urethra TS28