Histology of toracic aorta in domestic mammals

Abstract

The histology of the medium third of the thoracic aorta has been studied in the following species: Equus caballus, Sus scrofa, Canis familiaris, Felis domesticus, Bos indicus and Capra hircus. The observations permit the conclusion that the different components of the aortic wall behave in a variable form, according to its species. In all species studied, it has been verified that the basilar membrane is always discontinuous and that the subendothelial layer has very variable thickness. While the intern elastic membrane has only been observed in Sus scrofa, Felis domesticus and Capra hircus, a real extern elastic membrane was found in none of the mamiferous studied.