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ThesisItem Open Access COMPARATIVE STUDY ON THE MORPHOLOGY AND HISTOLOGY OF TESTIS AND EPIDIDYMIS OF SLOTH BEAR (melursus ursinus) AND DOG(KARNATAKA VETERINARY, ANIMAL AND FISHERIES SCIENCES UNIVERSITY, BIDAR, 2018-07) ASHOK KUMAR M.R; ASHOK KUMAR M.R; Dr. K. V. JAMUNA; Dr. K. V. JAMUNAThe comparative study of morphology and histology of testis and epididymis in sloth bear and nondescript dog was conducted. Morphologically significant difference were recorded between testes of sloth bears and nondescript dogs. Histologically, tunica albuginia of sloth bears was thicker, having multiple muscular layers and dense fibrous connective tissue. Seminiferous tubules of sloth bear were more convoluted, whereas interstitial tissue between seminiferous tubules was more in nondescript dog, which were sorrounded by layThesisItem Open Access COMPARATIVE STUDY ON THE MORPHOLOGY AND HISTOLOGY OF TESTIS AND EPIDIDYMIS OF SLOTH BEAR (melursus ursinus) AND DOG(KARNATAKA VETERINARY, ANIMAL AND FISHERIES SCIENCES UNIVERSITY, BIDAR, 2018-08) ASHOK KUMAR M.R; Dr. K. V. JAMUNAThe comparative study of morphology and histology of testis and epididymis in sloth bear and nondescript dog was conducted. Morphologically significant difference were recorded between testes of sloth bears and nondescript dogs. Histologically, tunica albuginia of sloth bears was thicker, having multiple muscular layers and dense fibrous connective tissue. Seminiferous tubules of sloth bear were more convoluted, whereas interstitial tissue between seminiferous tubules was more in nondescript dog, which were sorrounded by layers of contractile cells. Seminiferous tubules showed sertoli cells and adjacent spermatogonia cells were lined basally. Primary spermatocytes were larger than spermatogonia cells and towards the lumen spermatids were seen in sloth bears and nondescript dogs. The amount of reticular fibres surrounding leydig cells in the interstitium of nondescript dog was more. Efferent ductules were covered by thick collagen fibres in sloth bear, whereas in nondescript dog loose connective tissue existed. Epididymis had 4 types of cells in lining epithelium namely tall columnar principle cells, basal cells, apical cells and vacuolated cells were seen in sloth bears and nondescript dogs. Surface epithelium showed undulated projections in tail of epididymis in sloth bear. Secretory blebs were seen in lumen of both the species. Tail of the epididymis showed sperm mass in lumen of nondescript dogs. Micrometrically, there was no significant difference in seminiferous tubular diameter, whereas seminiferous tubules capsular thickness, tubular diameter and capsular thickness of head, body and tail of epididymis of both sloth bears and nondescript dogs showed significant difference. The tubular diameter and capsular thickness of head and body of epididymis is more in nondescript dogs where as in tail of epididymis, it was viseversa.ThesisItem Open Access COMPARATIVE STUDY ON THE MORPHOLOGY AND HISTOLOGY OF TESTIS AND EPIDIDYMIS OF SLOTH BEAR (melursus ursinus) AND DOG(KARNATAKA VETERINARY, ANIMAL AND FISHERIES SCIENCES UNIVERSITY, BIDAR, 2018-07) ASHOK KUMAR M.R; Dr. K. V. JAMUNAThe comparative study of morphology and histology of testis and epididymis in sloth bear and nondescript dog was conducted. Morphologically significant difference were recorded between testes of sloth bears and nondescript dogs. Histologically, tunica albuginia of sloth bears was thicker, having multiple muscular layers and dense fibrous connective tissue. Seminiferous tubules of sloth bear were more convoluted, whereas interstitial tissue between seminiferous tubules was more in nondescript dog, which were sorrounded by layers of contractile cells. Seminiferous tubules showed sertoli cells and adjacent spermatogonia cells were lined basally. Primary spermatocytes were larger than spermatogonia cells and towards the lumen spermatids were seen in sloth bears and nondescript dogs. The amount of reticul
