Large intestine - Wikipedia
en.wikipedia.org
[1] The four sections of the colon are: the ascending colon, transverse colon, descending colon, and sigmoid colon. These sections turn at the colic flexures. The parts of the colon are either intraperitoneal or behind it in the retroperitoneum.
Sigmoid colon - Wikipedia
en.wikipedia.org
The sigmoid colon (or pelvic colon) is the part of the large intestine that is closest to the rectum and anus. It forms a loop that averages about 35–40 centimetres (14–16 in) in length. The loop is typically shaped like a Greek letter sigma (ς) or Latin letter S (thus sigma + -oid). This part of the colon normally lies within the pelvis, but due to its freedom of movement it is liable to ...
Colon cancer - Symptoms and causes - Mayo Clinic
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Anatomy of the Colon, Rectum, and Anus - Clinical Tree
clinicalpub.com
The four segments of the colon are known as the ascending, transverse, descending, and sigmoid colon. The ascending and descending colon are situated retroperitoneally, and the transverse and sigmoid colon are situated intraperitoneally.