Morpho-structural study of the pancreas and pancreatic duct in ostrich (Struthio camelus L.)

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Abstract

The peculiarity of the digestive process in ostrich and the lack of bibliographic data on the pancreas and its excretory system in this species led us to undertake macroscopical and histological investigations to explore possible differences compared to other avian species. Our findings demonstrated the presence of two pancreatic lobes, dorsal and ventral, and a third lobe, the splenic lobe, detectable only histologically. The most interesting data concerned the number, course, drainage and structural peculiarities of the pancreatic duct. The structural and ultrastructural features of the two cell types lining the pancreatic duct (main cells and globose cells) were suggestive of their role in secretion and resorption of the pancreatic juice. The results allow the understanding of the particular digestive process of this species.

Figures

  • Fig. 1. Pancreas in the duodenal loop with the pancreatic duct (Pd).
  • Fig. 2. (a) Pancreatic duct opening in the duodenal papilla (*) and an unusual presence of two pancreatic ducts (b).
  • Fig. 3. Pancreatic duct with accessory pancreas (*) in the lamina propria. PAS / H. Scale bar 250 µm. Square scale bar 100 µm.
  • Fig. 4. Simple columnar epithelium of the pancreatic duct with PAS positive (a) and metachromatic granules (b). Globose cell (Gc) between the main cells which show variable tinctorial affinity (c). PAS/H, toluidine blue, toluidine blue + methylene blue. Scale bar 30 µm.
  • Fig. 5. Main cells with microvilli, electron-dense granules and mitochondria (M) with tubular cristae. Adhesion structures are visible between adjacent cells. Scale bar 2 µm.
  • Fig. 6. Main cell: Golgi apparatus (Ga), RER and ribosomes free (Fr) or organized in to polyribosomes (Pr). Scale bar 1 µm.
  • Fig. 7. Globose cell (Gc) with numerous swollen mitochondria and clear vescicles. Scale bar 5 µm.

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CITATION STYLE

APA

Stornelli, M. R., Ricciardi, M. P., Miragliotta, V., Coli, A., & Giannessi, E. (2006). Morpho-structural study of the pancreas and pancreatic duct in ostrich (Struthio camelus L.). Acta Veterinaria Brno, 75(2), 157–160. https://doi.org/10.2754/avb200675020157

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