Digestive system Artwork from Andreas Vesaliuss anatomical textbook De Humani Corporis Fabrica published The abdomen of this male cadaver has been dissected and the liver top reflected upwards to reveal the underlying organs The stomach is at centre right the gallbladder and adjoining bile duct at centre left and the intestines with attached folds of peritoneal membrane known as mesentry at lower right Vesalius was a Belgian physician often referred to as the father of modern anatomy