The left side of the lesser curvature of the stomach is supplied by which of the following?

The left gastric artery is the correct answer because it is a direct branch of the celiac trunk that supplies blood to the lesser curvature of the stomach, particularly the left side. This artery runs along the lesser curvature from the cardiac region down to the pylorus, providing essential blood supply to this area of the stomach, which is critical for proper gastric function and health.

The common hepatic artery primarily supplies the liver and does not specifically target the lesser curvature of the stomach. Although it branches into arteries that could indirectly supply the stomach, it is not the primary source for the left side of the lesser curvature. The right hepatic artery serves the liver and has no significant role in supplying the stomach itself. The gastroduodenal artery, while it supplies parts of the stomach, primarily focuses on the greater curvature and adjacent structures rather than the left side of the lesser curvature.

Thus, the left gastric artery is the only vessel directly responsible for vascularizing the left aspect of the lesser curvature of the stomach.