A diagram of the abdomen shows that the abdominal cavity contains a number of vital organs, including the stomach, intestines, kidneys, pancreas, liver and gallbladder. It is the largest cavity in the human body, with the diaphragm situated between it and the chest cavity. The pelvic muscles form the floor of the abdominal cavity and the intestines take up the majority of the space, separated into small and large intestines. Most of the organs are devoted to digestion.
The liver is the most dorsal, or topmost, organ in the abdominal cavity, mainly responsible for cleansing harmful substances from the blood, such as alcohol. The stomach, a small J-shaped sac, is next to the liver and is responsible for breaking down food. The gallbladder and right kidney are situated between the liver and stomach, with the left kidney on the opposite side. The kidneys absorb liquid waste and filter it out through the bladder and urinary canal. The pancreas, meanwhile, is slightly below the stomach and is responsible for producing insulin.
The stomach leads into the small intestine, which is approximately 20 feet long and absorbs nutrients from broken-down food. The large intestine wraps around the outside of the small intestine and expels solid waste from the body.