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Muscles of the abdominal wall

The abdominal wall is the anterior trunk of the body bounded superiorly by the thorax and inferiorly by the pelvis. Five flat muscles compose the abdominal wall: the rectus abdominis and pyramidalis muscles, which run vertically near the midline; and the external oblique, internal oblique, and transversus abdominis muscles, which run posterolaterally toward the midline. Together,