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a: Celiac trunk and the main branches (splenic artery, hepatic artery, and left gastric artery).
b: Arterial system (superior mesenteric artery with distal branches). The branch of SMA to pancreas (IPDA) is distributed mainly in the connecting lobe.
SMA, superior mesenteric artery; IPDA, inferior pancreaticoduodenal artery; MCA, middle colic artery.
