part of part of anatomical wall thoracic segment of trunk thoracic wall The thoracic wall (or chest wall) is the boundary of the thoracic cavity. The bony portion is known as the thoracic cage. However, the wall also includes muscle, skin, and fascia. Subdivision of chest wall which includes the ribcage, muscle group of thoracic wall and costal pleura. Examples: There is only one thoracic wall[FMA:10428]. FMA:10428 chest wall MESH:D035441 Wikipedia:Thoracic_wall UBERON:0016403