Ramakrishna, VPawar, Ashok2019-08-142019-08-142001No. of references 84http://krishikosh.egranth.ac.in/handle/1/5810121787"The present study on the histology and histochemistry of the endocrine organs viz. pineal , Pituitary , thyroid , parathyroid and adrenal gland in the young and adult Indian donkey to know the cytoarchitecture and histochemical characterstics of the cells with their location and functional status. The gross morphological studies revealed the location and position of various endocrine organs in the Indian donkey. Histologically, the pineal gland consisted of pinealocytes, me lanocytes and glial cells in the parenchyma. Th e presence of two types of pinealoc ytes indicate the functional status of the gland. The pituitary gland consisted of a d e n oh yp op h y sis and neurohypophys is. The a d e n o h yp o p h y s is consisted of acidophils, basophils and ch romo p h o be s . Neu ro hyp o ph y s is consisted of pituicytes and neuroglial cells. Herring bodies were noticed in the n ear blood vessels. Thyroid gland mainly consisted of small, me d ium and large follicle Vi/ith blood vessels and parafollicular cells. The presence of small follicles were more in n umb e r and lineu by cuboidal epithelium in young donkey. Large follicles lined by tlat epithelium with loss or no colloid indicatGd ttu? aclivily of the gland. Parathyroid gland consisted, oxyphil,two types pf cliie f cells and parafollicular cells. Th e adrenal gland was consisted of outer cortex, middle g a nglionic and medulla. Epinephrine and norepinephrine cells were noticed in the niedulla. Histochemically. Histochemically the pinealocytes of the pineal, basophils and neurosecretory substances (Herring bodies) o f pituitary, colloid o f tlie thyroid, chief cells and oxyphil cells of parathyroid and zona arcuata and zona reticularis of adrenal gland showed PAS positive reaction. Pinealocytes of pineal, basophils of pituitary, follicular epithelium and colloid o f follicles, chief cells o f parathyroid and ganglionic cells o f the adrenal gland were alcian blue (pH 2.5) positive. No significant difference in the histology and histochemistry between young and adult Indian donkey endocrine glands except pineal and thyroid gland."ennullThesis