Abstract: This research was carried out to define the morphological features of infundibulum and magnum in turkey and pigeon. For this purpose, a total of 10 adult healthy turkey (No=5) and pigeon (No= 5) were used. After dissecting, infundibulum and magnum of each specimen was separated by incision and fixed in 10% buffered formalin. For histological studies, after tissue preparation and staining with H&E and special stains, histological layers of infundibulum and magnum were recognized and the size was determined using micrometry method. In turkey, the epithelium of infundibulum was variable in upper end and lower end. It was simple cuboidal in upper end and ciliated simple columnar in middle and lower end. In pigeon, the epithelium of infundibulum was ciliated simple columnar. In histometrical studies, the length of mucosal folds of infundibulum in pigeon and turkey were 500.47±57.7µm and 125.25±28.8µm respectively. Mucosal folds in pigeon were leaf shape with secondary folds. The funnel part of infundibulun had no gland but there was seen serous acinus gland in lamina propria of tubular part of it. In pigeon cilia was distinctable. In magnum, epithelium was ciliated pseudostratified in turkey and ciliated pseudostratified columnar in pigeon. In lamina propria mucosal glands with basophilic cytoplasm were seen very extensive. In pigeon, mucosal folds were in different shape and the length of them was seen 1987.5±161.25µm and 775.12±35.16µm in turkey and pigeon respectively.

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