Stomach, illustration. The oesophagus is shown entering the stomach at the cardiac orifice and distally the pylorus continues as the duodenum. At the lesser curvature is the gastric artery and gastric vein with the gastroepiploic vessels seen along the greater curvature. A small flap of peritoneum has been peeled open to reveal the smooth muscle tunic of the stomach. From Lizars, J. 1823 A system of anatomical plates of the human body. W.H. Lizars, Edinburgh.