第二节、腹前外侧壁 C Anterior and lateral abdominal wall) 1肌 muscles ▲2层次 layers ▲3重要结构 mportant structures 4血管和神经 vessels and nerves ▲5腹股沟区 inguinal region第二节、腹前外侧壁 （Anterior and lateral abdominal wall） 1.肌muscles 2.层次layers  3.重要结构important structures 4.血管和神经vessels and nerves 5.腹股沟区inguinal region