肌层
Tunica muscularis glandulae seminalis
定义
精囊的肌层（中层或肌性外膜）较输精管薄，由两层排列组成，外层为纵行肌，内层为环形肌。
參考資料
This definition incorporates text from a public domain edition of Gray's Anatomy (20th U.S. edition of Gray's Anatomy of the Human Body, published in 1918 – from http://www.bartleby.com/107/).
