Iliac colon
Encyclopedia
The iliac colon is situated in the left iliac fossa
Iliac fossa
The iliac fossa is a large, smooth, concave surface located on the internal surface of the ilium...

, and is about 12 to 15 cm. long.

It begins at the level of the iliac crest
Iliac crest
-External links: - "Superficial muscles of the gluteal region and posterior thigh." - "Anterior Abdominal Wall: Osteology and Surface Anatomy " - "The Back, Posterior View" * *...

, where it is continuous with the descending colon
Descending colon
The descending colon of humans passes downward through the left hypochondrium and lumbar regions, along the lateral border of the left kidney....

, and ends in the sigmoid colon
Sigmoid colon
The sigmoid colon is the part of the large intestine that is closest to the rectum and anus. It forms a loop that averages about 40 cm...

 at the superior aperture of the lesser pelvis
Lesser pelvis
The lesser pelvis is that part of the space enclosed by the skeleton of the pelvis which is situated between the pelvic inlet and the pelvic floor. Some authors call this cavity the pelvic cavity...

.

It curves downward and medialward in front of the Iliacus and Psoas
Psoas
Psoas can refer to:* Psoas major muscle* Psoas minor muscle* Psoas sign, psoas test...

, and, as a rule, is covered by peritoneum
Peritoneum
The peritoneum is the serous membrane that forms the lining of the abdominal cavity or the coelom — it covers most of the intra-abdominal organs — in amniotes and some invertebrates...

on its sides and anterior surface only.
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