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Histological Observations on the Infundibulum of Kuttanad Duck ( Anas platyrhynchos domestics ) during Postnatal Period

Postnatal histological development of infundibulum of the oviduct in the Kuttanad duck (Anas Platyrhynchos domesticus) was studied using 78 ducks in different stages of development from day-old to 24th week of age. In the day-old ducklings, the cranial end of the undifferentiated oviduct corresponded to the infundibulum with no distinct differentiation into different tunics. At 12th week of age, tubular glands first appeared in the lamina propria of the neck region which was accompanied by ciliogenesis. Goblet cells increased in number in the lining epithelium of the caudal most region of the neck of the infundibulum, at 24th week of age. At this age, the proprial glands in the neck of the infundibulum were large in diameter, which increased in number as well as width gradually and attained maximum width. In all the age groups, lamina propria of the funnel region of the infundibulum was devoid of any glands and the mucosal folds in the funnel were shorter than that of neck region. Tunica mucosa occupied the maximum thickness followed by the tunica muscularis and tunica serosa respectively.