The seminal vesicles are two sacs which lie next to the ampullae (the enlarged endings of the vasa deferentia) behind the bladder and near the top of the prostate gland.

• 精囊腺是两个侧置于壶腹（输精管的膨大末端）旁、居膀胱后方、靠近前列腺顶端的囊袋状结构。