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Four Quadrants formed by two perpendicular lines that intersect at umbilicus
Right Lower Quadrant
Urinary bladder, appendix, cecum, ascending colon of Large Intestine, small intestine
Left Lower Quadrant
Transverse and descending of Large Intestine, small intestine, initial part of sigmoid colon, urinary bladder
Nine regions formed by superior horizontal plane just inferior to ribs, inferior horizontal plane to hip bone, vertical planes just medial to nipples
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