（肛门和肛道的总称） anus:脱 ～ prolapse of the anus ◆肛裂 {医} anal fissure;Allingham's ulcer;fissure in ano [anus]；肛瘘 anal fistula;fistula in ano;archosyrinx； 肛门 anus;anal opening;anal orifice;vent;archos;propygium;archocystocolposyrinx;tewel;bung； 肛门镜 anoscope； 肛提肌 musculus levator ani