Which curvature forms the longer, convex left border of the stomach?

• A. Greater curvature of the stomach
• B. Lesser curvature of the stomach
• C. Haustra
• D. Ileus

Answer: (A)

The key idea here is the stomach’s curvatures. The stomach has two curvatures: a longer, outer border and a shorter, inner border. The longer, convex border on the left side is the greater curvature, running from the gastroesophageal junction down to the pylorus and forming the stomach’s outer margin. It also serves as the attachment site for the greater omentum. The shorter, concave border on the right side is the lesser curvature, which attaches to the liver via the hepatogastric ligament as part of the lesser omentum. Haustra are pouches of the colon, and ileus is a bowel distention/obstruction condition, not a stomach border. So the longer convex left border is the greater curvature.