The sigmoid colon, shaped like an S, is at the distal end of the descending colon and leads into the rectum.

形似S的乙状结肠位于降结肠的远端并通向直肠。

Extending from the end of the ileum to the anus, it is divided into four parts: cecum, colon, sigmoid colon and rectum.

大肠从回肠末端延伸到肛门，并分为四个部分：盲肠，结肠，乙状结肠和直肠。