Please use this identifier to cite or link to this item: http://dspace.cvasu.ac.bd/jspui/handle/123456789/1638
Title: MORPHOMETRICALAND HISTOMETRICAL INVESTIGATIONS ON THE THYMUS AND BURSA FABRICIUS OF COBB-500 BROILER CHICKENS OF BANGLADESH
Authors: SHAHIDULLAH, A.F.M
Issue Date: Jun-2013
Publisher: Chattogram Veterinary & Animal |Sciences University
Abstract: The gross anatomical as well as histological study was carried out among 15 broiler chickens of different ages ranging up to 1 day to 5 weeks regardless of sex. For the anatomical investigation the longitudinal diameter, transverse diameter, no of folds, and no of lobes along with their corresponding weight was measured and tabulated. The percentage of thymic and bursal weight in relation to the body weight was also calculated. The thymus gland consists of about 5-8 pairs of pale pink, flattened, irregularly shaped lobes strung out along both sides of the neck, just superficial to the jugular veins. The posterior end of the right thymic lobe extended beyond the posterior end of the left thymic lobe. The largest lobe was located close to the thyroid gland at the base of the neck. The lobes are extended from anterior cervical region to anterior thoracic region as observed by Koch (1973) in birds. The bursa of Fabricius is located as a diverticulum in the dorsal wall of the cloaca. This bursa contains lymphatic tissue and has a function related to immunity and antibody production. On postmortem inspection, the bursa of Fabricius is called the “rosebud”. When it is intact, it appears as a small sac on the side of the cloaca. Both these glands gradually regress as the bird matures. For the histological investigation samples of the thymus and bursa of Fabricius were collected for histological studies and different types of cellular structures including thymic epithelial vesicles ,hassals corpuscle,plicae of the bursa etc
URI: http://dspace.cvasu.ac.bd/jspui/handle/123456789/1638
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