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Considerando a importância do plexo mientérico e a escassez de dados sobre o mesmo em peixes, realizamos o presente trabalho, com a finalidade de contribuir com a caracterização do plexo mientérico nesses animais. Para tanto, o segmento terminal do intestino de 10 exemplares adultos de Cyprinus carpio foi submetido a técnicas de rotina para obtenção de cortes histológicos transversais de 6 e 10µm de espessura, corados pelo método de Weigert-Van Gieson, e de preparados de membrana corados pelo método de Giemsa. Observamos o plexo mientérico constituído por neurônios isolados e por gânglios contendo grupos de dois ou mais neurônios. As porcentagens de neurônios pequenos, médios e grandes foram 48,8%, 47,6% e 3,6%, respectivamente. A densidade neuronal em 6,64mm2 de segmento intestinal foi 5.099 ± 384.35. Considering the importance of the myenteric plexus in fishes and the scarcity of data about it, research was undertaken with the purpose of contributing to the characterization of the myenteric plexus in fishes. The terminal segments of intestines of ten adult Cyprinus carpio underwent routine techniques of transverse histological sections of 6 and 10μm in thickness, stained with Weigert-Van Gieson, as well as whole-mount preparations stained with the Giemsa method. The myenteric plexus composed of isolated neurons and ganglia containing groups of two or more neurons was analyzed. Percentages of small, medium and large neurons were 48.8%, 47.6% and 3.6% respectively. Neuronal density in 6.64mm2 of intestinal segment was 5,099 ± 384.35

acta scientiarum. biological sciences

Morphoquantitative characteristics of myenteric neurons of the terminal segment of the intestine of Cyprinus carpio (Linnaeus, 1758) (Osteichthyes, Cyprinidae)