Final answer:
The proper anastomosis that explains the continued function of organs despite a blockage in the celiac trunk is between the superior and inferior pancreaticoduodenal arteries, which provide collateral circulation to the pancreas and the duodenum.
Step-by-step explanation:
The correct anastomoses explaining the function of organs despite thrombotic occlusion of the celiac trunk is between the superior pancreaticoduodenal artery and the inferior pancreaticoduodenal artery. These arteries, branches of the celiac trunk and the superior mesenteric artery respectively, supply the pancreas and portions of the duodenum. This anastomosis allows for collateral circulation to maintain blood supply in the event of a blockage.
The celiac trunk provides blood to the liver, stomach, and duodenum. Possible anastomoses among its branches include connections between the left gastric artery and right gastric artery, and between the proper hepatic artery and gastroduodenal artery.
The left gastroepiploic artery and right gastroepiploic artery anastomosis plays a role in maintaining blood supply to the greater curvature of the stomach, while the anastomosis between right colic artery and middle colic artery serves areas of the colon.