Girish Mahajan (Editor)

Abdominal wall

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Latin  paries abdominalis
FMA  299989
Abdominal wall

In anatomy, the abdominal wall represents the boundaries of the abdominal cavity. The abdominal wall is split into the posterior (back), lateral (sides) and anterior (front) walls.


There is a common set of layers covering and forming all the walls: the deepest being the parietal peritoneum, the extraperitoneal fat, the transversalis fascia, the internal and external oblique and transversus abdominis aponeuroses, and a layer of fascia, which has different names according to what it covers (e.g., transversalis, psoas fascia).

In medical vernacular, the abdominal wall most commonly refers to the layers composing the anterior abdominal wall which, in addition to the layers mentioned above, includes the three layers of muscle: the transversus abdominis (transverse abdominal muscle), the internal (obliquus internus) and the external oblique (obliquus externus).

Layers of anterior abdominal wall

In human anatomy, the layers of the abdominal wall are (from superficial to deep):

  • Skin
  • Subcutaneous tissue
  • Fascia
  • Camper's fascia - fatty superficial layer.
  • Scarpa's fascia - deep fibrous layer.
  • Muscle
  • External oblique abdominal muscle
  • Internal oblique abdominal muscle
  • Rectus abdominis
  • Transverse abdominal muscle
  • Pyramidalis muscle
  • Fascia transversalis
  • Peritoneum
  • Inner surface

    The surface contains several ligaments separated by fossae:


    Abdominal wall Wikipedia