Does D2 get its source of arterial supply from celiac trunk or superior mesenteric artery or both?
The descending segment of the duodenum receives its primary arterial supply from the celiac trunk and its branches. Distal to the ligament of Treitz (jejunum), receives the primary arterial supply from the superior mesenteric a. This all follows the embryologic development of the foregut and midgut and their associated vascular supply.
