The majority of the stomach is located in the left quarter rib area of the body, with a small portion located in the upper abdominal area. The left quarter rib region may also be called the left upper abdomen, and the abdomen is often divided into nine regions. A horizontal line is drawn from the lowest point of the ribs on each side (or the lowest point of the 10th rib), and a perpendicular line is drawn through the left iliac node; the area to the left of the intersection of these two straight lines is the left supra-abdominal region. The area to the left of the intersection of the two lines is the left upper abdomen. The area above the horizontal line is the supra-abdominal region. The right side of the anterior wall of the stomach is close to the left lobe of the liver, the left side is close to the diaphragm, and the surface is covered by the left side of the ribs; the posterior wall of the stomach is close to the upper left kidney and the transverse colon, and the fundus of the stomach is close to the diaphragm and the spleen. The cardia and pylorus of the stomach are less mobile and are located in a more fixed position, with the cardia on the left side of the 11th thoracic vertebra and the pylorus on the right side of the 1st lumbar vertebra. The greater curvature of the stomach is located low, usually at the level of the umbilicus.