精囊腺
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。以前人们认为精囊腺恰好是积聚起来的精子的储存地，不过现在其主要功能为分泌液体的观点占了上风。它们分泌的液体与前列腺液一起激活射精后的精子活跃地运动。
The Seminal Vesicles
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. It was formerly believed that the seminal vesicles just served as storage space for accumulated sperm. However, today the opinion prevails that their main function is to provide a fluid which, together with that of the prostate gland, activates the vigorous movement of the sperm cells after ejaculation.
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