Final answer:
The left colon receives its arterial blood supply from the inferior mesenteric artery, particularly via its left colic branch, which is paramount for the distal large intestine's blood circulation. Option A
Step-by-step explanation:
The arterial blood supply to the left colon primarily comes from the inferior mesenteric artery. This artery supplies blood to the distal part of the large intestine, which includes the left colon.
Branches of the inferior mesenteric artery that are specifically involved in supplying the left colon include the left colic artery, which typically arises from the inferior mesenteric artery and supplies the descending and sigmoid parts of the colon.
Additionally, the superior mesenteric artery provides branches such as the ileocolic, right colic, and middle colic arteries, which supply the cecum, ascending colon, and transverse colon, respectively.
For the left colon, however, the key arterial supply is the inferior mesenteric artery and its subsidiary branches, not the superior mesenteric artery. So option A