メニューのAnatomyはBook & Atlasにリンクしてあります。
浅膀胱三角筋【せんぼうこうさんかくきん】 Continuation of the inner layer of longitudinal muscle of the ureter. Muscle cells from the left and right converge to form a triangular sheet at the trigone of bladder, the apex of which continues into the posterior wall of the urethra, in the male extending to the seminal colliculus.