4. Spongy part of urethraBladderBladderProstate2nd bend when penis is flaccidABBulbo-urethral gland and duct1st bendPenisInternal urethral sphincter(smooth muscle)External urethral sphincter(skeletal muscle)Deep perineal pouchPerineal membraneGlans clitorisExternal urethral sphincterNavicular fossaDeep perineal pouchPerineal membraneExternal urethral orificeDuct of Skene's glandPara-urethral gland (Skene's gland)Greater vestibular gland Vaginal opening in deep perineal pouchand perineal membraneExternal urethral orifice3. Membranous part of urethra2. Prostatic part of urethraUrethra1. Preprostatic part of urethra