Descending colon

Anatomy

Starts at splenic (left colic) colon flexure, at first directly behind transverse colon, front and sides covered by peritoneum, descending outside (lateral to) left kidney, then psoas, over aponeurosis of transversus abdominis and quadratus lumborum, past iliac crest down
to be continuous with sigmoid colon at top of lesser pelvis (ie true pelvis, ie at pelvic brim).

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