Abdomen The abdomen refers to the cavity in the mid-portion of the body bounded superiorly by the diaphragm that separates it from the thorax. The abdomen contains a number of organs including the pancreas, stomach, intestines, liver, spleen, bladder, and gallbl... more
Muscles of the Thorax and Abdomen The thorax comprises the major greater portion of the chest, and contains the rib cage (costal cartilages). There are six principal muscles of the thorax. These are the intercostales externi, intercostales interni, subcostales, transversus thoracis, leva... more
