ORIGEM E RAMIFICAÇÕES DAS ARTÉRIAS MESENTÉRICAS CRANIAL E CAUDAL EM TARTARUGA DA AMAZÔNIA Podocnemis expansa Schweigger, 1812, (Testudinata-pelomedusidae)

Abstract

RESUMO -Foram estudadas cinco Podocnemis expansa, fêmeas, cujo peso variava de 550 a 850 g. Os animais tiveram seu sistema arterial injetado com solução corada de látex sintético, fixados e armazenados em solução aquosa de formaldeído a 10%. Após abertura da cavidade celomática, as artérias mesentéricas cranial e caudal foram dissecadas. Encontrou-se a artéria mesentérica cranial como um ramo do tronco celíaco-mesentérico e originando as artérias pancreaticoduodenal caudal, ileocólica e jejunais, que irrigam o duodeno, pâncreas, cólon, íleo e jejuno, respectivamente. A artéria mesentérica caudal origina-se da aorta (60%) ou da artéria ilíaca comum (40%), distribuindo-se para o cólon e reto.Palavras chave: Podocnemis expansa, Artérias, Intestino, Anatomia.ABSTRACT -An anatomic study has been carried out on the mesenteric arteries of five Podocnemis expansa females weighing from 550 to 680 g. The animals had their artery system injected with a latex solution colored with a specific pigment and were then fixed in a 10% formol solution. After the coelomatic cavity being opened the cranial and caudal mesenteric arteries were dissected. It has been found that the cranial mesenteric artery is a branch of the coeliac mesenteric trunk while the cranial mesenteric artery gives off the pancreatic-duodenal , ileocolic and jejunal arteries that irrigate the duodenum, pancreas, colon, ileum and jejunum respectively. The aorta gives origen of as much as 60% of the caudal mesenteric artery, the remaining 40 % being originated from the common ileac artery, their branches reaching the colon and the rectum.Key words: Podocnemis expansa, Arteries, Gut, Anatomy. IntroduçãoAs funções primárias do trato digestório são a digestão e absorção de nutrientes essenciais aos processos metabólicos dos animais, além de revelar hábitos alimentares gerais, sendo útil para a sistemática. Os nutrientes digeridos são absorvidos pelo epitélio e transferidos para a circulação (HILDEBRAND, 1995

Morphology and Vascularization of the Gastric Compartments in Three-Toed Sloth (Bradypus torquatus Illiger, 1811)

“…Particular differences were found between B. torquatus and other mammals in relation to cranial floor vascularization of the peritoneal cavity. The gastric and celiac vessels were not directly involved with the liver and duodenum nutrition, diverging from the description in chelonians (Rodrigues et al;Santos et al, 2004), rodents (Culau et al), suidae (Cavalcante Filho et al, 1998) and , open diverticulum (C), pre-pyloric stomach I (E) and pre-pyloric stomach II (F). External views of: middle cardiac stomach (1), fundic stomach (2), diverticulum (3), left cardiac stomach (4), pre-pyloric stomach I (5), pre-pyloric stomach II (6), and pyloric sphincter (7).…”