author(s)
Renu Yadav, Ajay Prakash, MM Farooqui, SP Singh, Abhinov Verma and Amit Vishen

abstract
Present study was conducted on the endocrine part of pancreas of twenty four apparently healthy chabro chickens irrespective of sex. The birds were divided into 0 day, 30 days, 60 days and 150 days age groups. Islets of Langerhans in chabro chicken were usually oval and rounded in shape but some of these were also irregular, quadrilateral and elongated. Their occurrence was relatively much higher in splenic lobe. Some developing islets had a cluster of acinar and islets cells. Fully developed islets were beta and mixed types. Beta islets were formed by the clustures of oval, triangular, irregular, elongated and polyhedral beta cells. Mixed islets consisted of beta and alpha cells and were found only in splenic lobe. The alpha cells were spherical, elongated and irregular in shape and appeared relatively smaller than beta cells. The capillaries were commonly observed inside islets which, sometimes, formed dilated sinus like structures.