what is abdomen

The abdomen is the front part of the abdominal segment of the torso, which is the largest space in the body cavity, lying between the chest or thorax above and the pelvis below. It contains many vital organs, including the stomach, small and large intestines, liver, spleen, gallbladder, pancreas, and reproductive organs. The abdomen is a large body cavity enclosed by the abdominal muscles, at the front and to the sides, and by part of the vertebral column at the back. It is continuous with the pelvic cavity and is attached to the thoracic cavity by the diaphragm