The human abdomen is derived from the Latin word meaning "belly" and comprises the part of the body between the pelvis and the thorax. From an anatomical perspective, the abdomen stretches from the thorax at the diaphragm to the pelvis brim. The space above the pelvic brim and below the thoracic diaphragm is termed the abdominal cavity. The boundaries of the abdominal cavity are collectively referred to as the abdominal wall.
Functionally, the abdomen is where most of the alimentary tract is placed and so most of the absorption and digestion of food occurs here. The alimentary tract in the abdomen consists of the lower esophagus, the stomach, the duodenum, the jejunum, ileum, the caecum and the appendix, the ascending, transverse and descending colons, the sigmoid colon and the rectum. Other vital organs inside the abdominal cavity include the liver, the kidneys, the pancreas and the spleen.
The Human 3D software contains detailed human anatomy diagrams of the abdomen.
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