The mesenteric ganglia are two groups of nerve cells that belong to the chain of prevertebral ganglia of the sympathetic nervous system, innervating the gastrointestinal organs. The human being has two mesenteric ganglia:
1) The superior mesenteric ganglion, which is located on the anterior surface of the abdominal aorta, at the point of origin of the superior mesenteric artery; its nerve fibers runs along this blood vessel and innervates the small intestine.
2) The inferior mesenteric ganglion is also found on the anterior side of the abdominal aorta but adjacent to the point where the inferior mesenteric artery arises. It supplies and innervates the large intestine and the bladder.