Anatomy
Loop of colon continuous above with descending colon, ordinarily within pelvis (mobile, can be displaced), starting at pelvic brim, passing across in front of sacrum from left to right, then back left to midline at level S3 (3rd fused sacral vertebra), then down to be continuous with rectum, surrounded by peritoneum with a mesocolon, separated from bladder (male) or uterus by loops of SI.
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