直肠壶腹
Ampulla recti
定义
直肠长约12厘米，其起始处管径与乙状结肠相似，但在其末端附近扩大形成直肠壶腹。
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/).
