环肌层
Stratum musculare circulare recti
- 拉丁语近义词： Stratum circulare tunicae muscularis recti
定义
环形层（环形纤维）在盲肠和结肠表面形成薄层，尤其在囊袋之间的间隔处积聚明显；在直肠处形成厚层，在肛管处数量增多，构成肛门内括约肌。
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/).
