Final answer:
The uncinate process is the part of the pancreas that lies between the superior mesenteric vessels and the aorta.
Step-by-step explanation:
The part of the pancreas that lies between the superior mesenteric vessels and the aorta is known as the uncinate process. The pancreas is an elongated organ in the abdomen, involved in both exocrine functions—secreting digestive enzymes—and endocrine functions—releasing hormones such as insulin and glucagon from the islets of Langerhans.
The uncinate process is a small hook-like structure extending from the lower part of the head of the pancreas. This part of the pancreas is situated posterior to the superior mesenteric vessels, making it an important anatomical landmark.