From the last arcade, small, straight vessels called vasa recta extend directly into the intestinal wall to provide localized blood flow.
The (also known as the ileal artery ) is a branch of the superior mesenteric artery (SMA) that specifically supplies oxygenated blood to the ileum , the final and longest section of the small intestine . Anatomical Role & Distribution
It arises from the left side of the superior mesenteric artery .
These arteries pass between the layers of the mesentery. Before reaching the intestinal wall, they divide and join with adjacent branches to form a series of loops or arterial arcades .