Anatomic Study of The Collateral Branches of The Abdominal Aorta of Primate SpeciesSaguinus niger

Abstract

Saguinus niger is a primate of the family Callitrichidae, with a geographical distribution limited to northern Brazil, Guyanas, Suriname and Venezuela, where it inhabits rainforests along the coast. Three adult females from the Paragominas Bauxite Mine--PA were used, donated to the Laboratory of Animal Morphology Research (LAMR) of the Federal Rural University of Amazonia. These animals had died of natural causes. The arterial system was filled with latex, and the animals were fixed in 10% formalin. Afterwards, the abdominal aorta and its collateral branches were dissected. The arrangement of the abdominal aorta branches in this species showed a similar arrangement as domestic animals but differing in the formation of the coeliac trunk. The coeliac trunk originates from the abdominal aorta, and from this trunk, we found the hepatic, left gastric and splenic arteries, where the origin of these vessels was variable. These arteries originate from the coliac trunk or a common trunk originating from the coeliac trunk, a characteristic not described in other species. The other branches of the abdominal aorta from S. niger did not show great differences in origin when compared to other species.

Aortic branches and rete mirabile of the limbs of two‐toed sloth (Choloepus didactylus)

“…Among them, the trunk appears as the first artery ventral to the abdominal aorta and continues until it trifurcates into the hepatic, gastric, and splenic arteries, followed caudally by the cranial mesenteric artery. In the Black marmoset ( Saguinus niger ) (Andrade et al, 2015), besides the arteries that compose the celiac trunk, the cranial mesenteric artery also emerged, forming the celiac mesenteric trunk.…”

“…Regarding the blood supply to the adrenal gland, it can be supplied by numerous arterial branches, as in C. didactylus , by one or more branches, as in E. sexcintus (Oliveira et al, 2019), sea lion ( Arctocephalus australis ) (Santos et al, 2011), A. azarae infulatus (Faria et al, 2016), S. niger (Andrade et al, 2015) and Landrace pigs ( Sus scrofa domesticus ) (Carneiro e Silva et al, 2001) or by a single branch, as seen in L. pardalis (Pinheiro et al, 2014). In C. didactylus , these branches arose directly from the abdominal aorta, but in other species, they could arise from the abdominal aorta, renal artery, or even together with the caudal phrenic artery, for example, in the coypus ( Myocastor coypus ) (Machado et al, 2002).…”

Macroscopic Aspects of the Cranial Mesenteric Artery (Arteria Mesenterica Cranialis) in Chinchilla Lanigera Species

“…Studies on the cranial mesenteric artery have been performed in dog (Schmidt and Schoenau, 2007), capuchin monkey (Andrade et al ,2015), buffalo frog (Koichiro et al, 2001), nutria (Culau et al, 2008), porcupine (Atalar and Ylmaz, 2005), raccoon (Lima et al, 2010), opossum (Pinto e Silva et al, 2008), rabbit (Uddin et al, 2012;Rada, 2014) and guinea pig (Shively and Stump, 1975).…”