Pattern of division and distribution of the mesenteric arteries in nutria (Myocastor coypus – Rodentia: Mammalia)

For the recognition of the anatomical pattern of the mesenteric arteries, ten adults nutria (Myocastor coypus), males and females, were dissected, and the following results were obtained: a) The cranial mesenteric artery appears from the ventral face of the abdominal aorta, close to the celiac artery (70%), or as a common trunk with it (30%). b) The direct branches of the cranial mesenteric artery are the caudal pancreaticoduodenal (100%), middle colic (100%), duodenojejunal (90%), pancreatic (10%), hepatic (10%), right colic (100%), jejunal (100%), ileocolic (100%) and ileal (100%) arteries. The caudal mesenteric artery appears from the ventral face of the abdominal aorta, immediately cranial to the emergence of the external iliac arteries, and it separates to form the cranial rectal and left colic arteries. This left colic artery can be anastomosed (30%), along the wall of the descending colon, with the descending branch of the middle colic artery