Boundaries of the abdomen Boundary ·Superiorly- xiphoid process(①，lower border of costal arch②③，11 th and12th ribs,vertebra T12 。Inferiorly- superior border of pubic symphysis(13), pubic crest(②，pubic tubercle(11), fold of inguinal canal, anterior superior iliac spine ASIS(⑦， iliac crest⑥，spinous process of L5Boundaries of the abdomen Boundary • Superiorly－ xiphoid process①, lower border of costal arch ② ③, 11th and 12th ribs, vertebra T12 • Inferiorly－ superior border of pubic symphysis⒀, pubic crest⑿, pubic tubercle⑾, fold of inguinal canal, anterior superior iliac spine ASIS⑦, iliac crest ⑥, spinous process of L5