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20184
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Subject: Veterinary Anatomy and Histology × End date: 2019 × Start date: 2010 × Thesis Type: M.V.Sc. ×
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    ThesisItemOpen 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. JAMUNA
    The 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 lay
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    ThesisItemOpen Access
    HISTOLOGY, HISTOCHEMISTRY AND ULTRASTRUCTURE OF HEART, LIVER AND PANCREAS IN PIGS (Sus scrofa domesticus)
    (KARNATAKA VETERINARY ANIMAL AND FISHERIES SCIENCES UNIVERSITY, BIDAR, 2018-09) BHARATH KUMAR, M. L.; Dr. K.V. JAMUNA
    The histology, histochemistry and ultrastructure of heart, liver and pancreas of pigs was studied. Epicardium was composed of mesothelium which was simple squamous epithelium resting on basement membrane, myocardium predominated with cardiac muscle fibres along with connective tissue and Purkinje fibres while endocardium was lined by endothelium beneath which there was subendothelial tissue. Histochemically myocardium showed least presence of neutral and acidic mucopolysaccharide, while epithelium and endothelium gave intense positive reaction. The coronary artery was made of three layers namely, tunica intima, tunica media and tunica adventitia of which tunica media was thicker composed of smooth muscle fibres interlaced with reticular fibres while tunica adventitia composed of loose connective tissue rich in elastic fibres. The moderator band was categorised into regions with the presence of cardiomyocytes and Purkinje fibres while endothelium acted as a capsule. Histologically valves had lamina fibrosa, lamina spongiosa and lamina atrialis/ ventricularis composed predominantly with collagen fibres, histiocytes and elastic fibres respectively. The papillary muscle and chordae tendinae junction was clearly demarcated and distinguished with abundant number of Purkinje fibres. Histochemically, various intensities of reactions of acid mucopolysaccharides and glycosaminoglycans in different regions of all the tissues were observed. The liver had capsule which entered the parenchyma and divided into different hexagonal shaped hepatic lobules which had central vein in the centre and radiating hepatic lamina composed of hepatocyes bordering sinusoids. Sinusoids had space of Disse lined with endothelium, Kupffer cells and Ito cells. Bile canaliculi between two hepatocytes were evident both histologically and ultrastructurally. Hepatocytes reacted differently to polysaccharides while capsule and interlobular septa showed intense positive reaction. Reticular fibres which was fine, branching and anastomosing framed the hepatocytes and sinusoids. The pancreas was tubuloacinar type of gland covered by a thin capsule, made up of predominantly collagen fibres. Each acinus showed a single row of pyramidal epithelial cells resting on the basement membrane. The cytoplasm of the acinar cells showed two distinct zones i.e., basal and apical zone which was basophilic and acidophilic with numerous zymogen granules. Three types of acinar cells were noted in pancreas i.e. active, resting and exhausted type. The duct system of the pancreas consisted of larger interlobular, medium sized intralobular and small intercalated ducts. The endocrine tissue appeared as lightly stained areas between the darkly stained acini of different shapes and sizes. The alpha cells had pale cytoplasm, ovoid nucleus occupied the peripheral region in the islet but beta cells with dark cytoplasm and spherical nucleus were in the centre. Delta cells were distributed mainly peripherally in the periphery of islets and they were irregular in shape with cytoplasmic process. Key words: Pig, Heart, Liver, Pancreas, Valves, Myocardium, Hepatocytes, Islets.
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    ThesisItemOpen 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. JAMUNA
    The 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.
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    ThesisItemOpen 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. JAMUNA
    The 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