The document discusses the anatomy of the abdomen. It defines the abdomen as the area containing organs like the pancreas, stomach, intestines, liver and gallbladder. It describes the abdomen's nine regions and lists the major organs it contains. The functions of the abdomen include housing and protecting viscera, breathing, pressure changes, and roles in urinary, digestive and reproductive systems. The document outlines the layers of the abdominal wall and muscles, and relations between the abdomen and other body regions like the thorax and pelvis.