Suprimento arterial dos lobos torácicos do timo em cães da raça Dogue Alemão

Abstract

A origem, o tipo e o número de ramos arteriais responsáveis pelo suprimento sanguíneo dos lobos torácicos do timo foram estudadas em 28 cães natimortos da raça Dogue Alemão. Para tanto, o sistema arterial destes animais foi preenchido com solução aquosa de Neoprene Latex “450” a 50%, corada com pigmento específico e, em seguida, fixados em solução aquosa de fomaldeído a 10%. Os lobos torácicos do timo foram supridos em ambos antímeros por ramos diretos e indiretos das artérias torácicas internas direita e esquerda e pericardicofrênicas direita e esquerda, pelos troncos costocervicais direito e esquerdo e pela artéria cervical superficial esquerda. A artéria subclávia esquerda e o tronco braquiocefálico também emitiram ramos diretos para o lobo torácico esquerdo do timo. ________________________________________________________________________________ ABSTRACT

The objective of this research was to identify if different kind of physical and alimentary management determine adaptative changes in morphometry of the esophagus-gastric transition epithelium. 15 sets comprehending the esophagus-gastric transition region (TEG) was used in adult horses considering undefined breed, gender and age divided in three groups according to diet and physical activity: group I – Five sets (TEG) of horses in intensive training fed with commercial ration; group II – Five sets (TEG) of horses which did not develop any intensive physical activity and fed by commercial ration; group III – Five sets (TEG) of horses kept in the grass without any extra feeding which did not develop any intensive physical activity. The esophagus-gastric transition region had its epithelium structure evaluated morphometrically where measurements were done to identify the thickness of the stratified squamous keratinized epithelium. The thickness of the grup I had as average 122.3µm, grup II 173.4µm of grup III 281.7µm. Results of stratified squamous keratinized epithelium thickness have shown the existence of statistically significant differences of group I when compared to group III.