The Light microscopic study of the pancreas in silurid catfish, Eutropiichthys vacha (Hamilton, 1822)
The cellular organization of the pancreas in Eutropiichthys vacha was characterized using histological and histochemical techniques. The pancreas was a diffuse organ located near the stomach, composed of exocrine and endocrine tissues. The main mass of the pancreas consisted of exocrine tissue, within which clusters of endocrine cells, interspersed with blood sinuses and encased in a thin capsule, were scattered and formed islets. The exocrine pancreas was composed of serous acini and duct system, which were concerned with the synthesis and transport of digestive enzymes into the gut. In contrast, pancreatic islets, made up of alpha, beta, and delta cells, control the production and release of peptide hormones into the bloodstream. The acinar cells, densely packed with zymogen granules, indicated an intense tryptophan reaction, implying the presence of precursors for various pancreatic enzymes associated with the fish's feeding behaviour.
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