<prompt> The hepatic poal vein is formed by the union of which of the following major vessels?Superior Mesenteric and Inferior Mesenteric VeinsSuperior Mesenteric and Splenic VeinsSuperior Mesenteric And left renal veinInferior Mesenteric and Splenic Vein  <response>: The hepatic poal vein is formed by the union of, a Splenic vein, which drains the spleen, pancreas, greater curvature of stomach, and b Superior mesenteric, which drains the small intestine andascending colon. The gastric vein, which drains the lesser curvature of the stomach, empties directly into the hepatic poal vein. 