The Thai Journal of Veterinary Medicine


A study on the histology of the extrahepatic bile ducts was conducted in eight female and eight male twentyweek- old healthy Iranian partridges (Alectoris chukar). The extrahepatic bile ducts possessed tunica mucosa, muscularis and serosa. The tunica mucosa of the extrahepatic bile ducts was lined by non ciliated simple columnar epithelium. The apical cytoplasm of epithelial cells was covered by a continuous striated border of microvilli. The goblet cells were absent in epithelium. Tunica mucosa formed some simple folds lining with tall columnar epithelium. The lamina muscularis mucosa was absent. All epithelial cells of the bile ducts reacted with acid and neutral mucopolysaccharides. The lamina propria-submucosa contained numerous diffuse lymphatic tissues. The tunica muscularis of the extrahepatic bile ducts was composed of a thick circular layer of smooth muscle fibers. The tunica serosa presented no striking features. No significant sex-based differences were found. It is concluded that the histology of the bile ducts of the Alectoris chukar was similar to that in guinea fowl except for the tunica muscularis. In addition, histochemical properties of the extrahepatic bile ducts of chukar were similar to those of chukar gall bladder.

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