The Probert Encyclopaedia of Medicine

ABDOMINAL WALL

Several sets of muscles support and propel the torso. The abdominal wall muscles help transfer force between the upper and lower body, and they also protect the delicate internal organs. Their most important function is to support the back. The muscles of the torso extend in several directions. They help maintain posture and aid the spinal muscles when bending, twisting, and other movements.
Research Abdominal Wall