Hj. Geyer et al., HISTOLOGY AND ULTRASTRUCTURE OF THE HEPATOPANCREAS OF THE TIGERFISH, HYDROCYNUS-FORSKAHLII, Journal of morphology, 227(1), 1996, pp. 93-100
Study of the histology and ultrastructure of the hepatopancreas of the
tigerfish, Hydrocynus forskahlii shows that the liver parenchyma is d
ivided into irregularly shaped lobules, separated by the exocrine panc
reas and associated connective tissue. The hepatocytes are arranged in
interconnecting cords or laminae, two to three cell layers in thickne
ss. Sinusoids separate the laminae. The spherical to oval-shaped hepat
ocytes contain large, round, centrally situated nuclei with prominent
nucleoli. The cytoplasm of the hepatocytes contains abundant rough and
smooth endoplasmic reticulae, free polysomes, and mitochondria. Exocr
ine pancreatic tissue is scattered throughout the liver. This tissue i
s encapsulated by an endothelium resting on a thin layer of connective
tissue and is separated from the liver parenchyma by a sinusoid. The
nuclei of the exocrine pancreas cells are spherical, basally situated
within the cells, and contain dark nucleoli. Vesicular rough endoplasm
ic reticulae and secretory granules lie in the apical regions of the e
xocrine pancreas cells. (C) 1996 Wiley-Liss, Inc.