Why is it called the marginal artery?

The marginal artery, also known as the marginal artery of Drummond, is called so because it forms a continuous arterial connection along the inner border of the colon, providing marginal blood supply. It is created by anastomoses between the terminal branches of the superior mesenteric artery and the inferior mesenteric artery. This "marginal" position allows it to serve as a crucial collateral route for blood flow, especially during situations where primary vessels may be compromised. Its name reflects its anatomical location along the margin of the colon.