posterior scrotal arteries posterior scrotal arteries the posterior scrotal arteries are branches of the internal pudendal artery. posterior scrotal arteriesthe superficial branches of the internal pudendal artery. (posterior scrotal arteries labeled at center right.)detailssourceinternal pudendal arteryveinposterior scrotal veinssuppliesscrotumidentifierslatinrami scrotales posteriores arteriae pudendae internaeta98a12.2.15.041mta24345fma75585anatomical terminology function the anterior scrotal arteries supply part of the scrotum in men.