The Saimiri sciureus is a non human primate that exists in the amazon region, which is not in the list of endangered animals according to IBAMA. So, this research systemized the collateral branches visceral of the abdominal aorta of these animals. It was used six animals, three males and three females, which had the circulatory system filled with latex Neoprene added of radiographic contrast. The results showed that the abdominal aorta ventrally emitted a collateral visceral branch called celiac artery, which originates three branches: left gastric, hepatic and lienal arteries. The branches of the celiac artery promoted the irrigation of the stomach, duodenum, liver, pancreas and spleen. Then the abdominal aorta emitted the cranial mesenteric artery, which was of a larger size than the celiac artery and was caudally juxtaposed. The cranial mesenteric artery supply branches that irrigate the final portion of the duodenum, pancreas, jejunum, ileum, cecum and colon. Abdominal aorta emitted laterally the right and left kidney arteries. The left adrenal artery as a collateral branch of the celiac artery and the right adrenal artery has been originated in the right renal artery. The mesenteric caudal artery was emitted from the ventral surface of the abdominal aorta, below the kidney arteries. In L6, abdominal aorta has two derivations to origin the right and left external iliac arteries and these had given origin to the internal iliac and femoral artery right and left. The testicular or ovary arteries were emitted in internal iliac arteries. Of the abdominal aorta led to origin the sacral median artery and in this sequence there is the caudal median artery. The study of this specie is very important to generate knowledge about non human primates existing in our country. It can be said that Saimiri sciureus is an important biological model for development of biomedical researches.
arteries; primates; morphology
