Abdominal organs, historical anatomical artwork. This ventral (front) view shows an abdomen with the peritoneum (abdominal lining) dissected away to show some of the organs involved in digestion. The liver (orange-red) and gall bladder (yellow are at upper left, the stomach (pink) extends from upper right to centre, and the small intestine (grey) lies below. Short regions of the colon (white) are visible at lower left, and the spleen (purple) is partially obscured by the stomach. The omentum (fatty peritoneal fold, yellow) lies over the intestines. This illustration is taken from the 19th century French textbook The Atlas of Human Anatomy and Surgery by J. M. Bourgery and N. H. Jacob.