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Abdominal Wall and Surface Anatomy (Abdominal Wall (Rectus Sheath,…

- - - - Superficial: musculophrenic A
      - Deep: superior epigastric A.
        Both terminal branches of int. thoracic A.
    - - Superficial: superficial epigastric + superficial
        circumflex iliac As.: branches of the femoral A.
      - Deep: Inf. epigastric + deep circumflex iliac As.:
        branches of the external iliac A.
- - - - Midway between jugular notch and pubic symphysis
      - 9th costal cartilage
      - Pyloric orifice and D1
      - DJ flexure
      - Fundus of the gallbladder
      - Left and right colic flexures
      - Neck of the pancreas
      - Lower part of left renal hilum, upper part of right
      - Origin of the SMA and coeliac trunk
    - - Joins lowest points of the 10th ribs
        Origin of IMA
    - - Joins the highest points of the iliac crests
        Bifurcation of the aorta
  - - - Inconsistent position
        Normally L3/L4 disc
    - - Upper border at the level of the fifth ICS on each side
      - Lower border from tip of 10th rib on right to just medial to mid clavicular line in the left 5th ICS
    - - Where the mid clavicular line meets the right costal
        margin: 9th costal cartilage
    - - Underlies ribs 9-11 on the left.
- - - - Myenteric plexus of Auerbach
      - Submucosal plexus of Meisner