Two or three of these accompany the ductus deferens .
Two or three of these supply the epididymis , anastomosing with the artery of the ductus deferens ; others pierce the back part of the tunica albuginea , and supply the substance of the testis .
Two or three of these accompany the ductus deferens , and supply the epididymis , anastomosing with the artery of the ductus deferens ; others pierce the back part of the tunica albuginea , and supply the substance of the testis .