The sigmoid colon (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 cm 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 on account of its freedom of movement it is liable to be displaced into the abdominal cavity.
is the sigmoid colon part of the large or small intestine
the large intestine