Which arterial branch serves the descending colon and sigmoid flexure?

The choice related to the arterial branch that serves the descending colon and sigmoid flexure is indeed the sigmoid branches. The sigmoid branches arise from the inferior mesenteric artery and specifically supply blood to the sigmoid colon, which is part of the large intestine that connects the descending colon to the rectum. These branches ensure adequate blood flow to the sigmoid flexure, a crucial area involved in the storage of fecal matter before defecation.

The descending colon receives blood supply primarily from the left colic artery, which is a branch of the inferior mesenteric artery. However, the specific supply to the sigmoid colon is accomplished by the sigmoid branches. This targeted vascular supply is essential for the functioning and health of the colon, facilitating nutrient absorption and waste management.

Understanding the vascular anatomy of the colon is important in interventional radiology, particularly when considering procedures that might involve the inferior mesenteric artery or its branches. It is essential to know which arteries vascularize specific segments of the colon for effective treatment planning and intervention strategies.