International Journal of Morphology
versión On-line ISSN 0717-9502
VICENTINI, C. A. et al. Morphological Study of the Liver in the Teleost Oreochromis niloticus . Int. J. Morphol. [online]. 2005, vol.23, n.3, pp. 211-216. ISSN 0717-9502. http://dx.doi.org/10.4067/S0717-95022005000300003.
Liver samples of Oreochromis niloticus cultivated in floating net cages were fixed for histological and ultrastructural studies with the objective of describing the hepatic parenchymal structure and the intrahepatic exocrine pancreatic tissue. Anatomically, the liver showed only two hepatic lobes. Histological analysis demonstrated that the hepatocytes were spread out as anastomotic cords, arranged in two cellular layers and surrounded by sinusoids. The intrahepatic exocrine pancreatic tissue exhibited an acinar arrangement and was diffused in the hepatic parenchyma. Structural analysis showed that the hepatocytes had a rounded nucleus and a rough endoplasmic reticulum with a parallel disposition to the nuclear membrane. The exocrine pancreatic cells showed secretion granules at the apical portion and the rough endoplasmic reticulum was concentrically distributed
Palabras llave : Liver; Exocrine pancreas; Morphology; Teleost.