What is the term for the connection between the superior mesenteric artery and inferior mesenteric artery?

The connection between the superior mesenteric artery and the inferior mesenteric artery is referred to as the marginal artery, also known as the marginal artery of Drummond. This vessel provides collateral circulation along the inner border of the colon, ensuring that blood supply remains adequate in case one of the primary mesenteric arteries becomes compromised.

The marginal artery forms by anastomoses of the terminal branches of both the superior and inferior mesenteric arteries, enhancing blood flow to the colon. Understanding this connectivity is crucial in surgical procedures involving the colon, as it helps in minimizing ischemic risks during resections.

Other options present related but distinct structures. Drummond's artery is a term that may refer to the marginal artery, but it's specifically the connections along the colon. The arc of Riolan refers to a specific anastomosis between the branches of the superior and inferior mesenteric arteries but is not the overall term for the connection. The celiac trunk is a major artery that supplies the foregut but does not involve the superior and inferior mesenteric arteries directly. Recognizing these distinctions is important for comprehending the vascular anatomy in surgical contexts.