The inferior mesenteric plexus is derived chiefly from the aortic plexus.
It surrounds the inferior mesenteric artery, and divides into a number of secondary plexuses, which are distributed to all the parts supplied by the artery, viz., the left colic and sigmoid plexuses, which supply the descending and sigmoid parts of the colon; and the superior hemorrhoidal plexus, which supplies the rectum and joins in the pelvis with branches from the pelvic plexuses.
This article incorporates text in the public domain from page 987 of the 20th edition of Gray's Anatomy (1918)
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