筋層(尿道前立腺部の)Muscular layer of prostatic urethra(Tunica muscularis urethrae prosticae)
筋層(尿道前立腺部の)【きんそう(にょうどうぜんりつせんぶの)】 Mostly a continuation of the muscular layer in the wall of the urinary bladder, passing over the preprostatic urethra into and onto the proximal part of prostatic urethra.