STUDY ON PRENATAL DEVELOPMENT OF ADRENAL GLAND OF SHEEP (Ovis aries)
| dc.contributor.advisor | RAJU, N.K.B(MAJOR) | |
| dc.contributor.advisor | JAGAPATHI RAMAYYA, P | |
| dc.contributor.advisor | DHANA LAKSHMI, N | |
| dc.contributor.author | RAJ SEKHAR, U | |
| dc.date.accessioned | 2018-11-30T10:39:04Z | |
| dc.date.available | 2018-11-30T10:39:04Z | |
| dc.date.issued | 2016-10 | |
| dc.description | THESES | en_US |
| dc.description.abstract | ABSTRACT: The present work was conducted to observe the histomorphogenesis and histochemical changes in adrenal parenchyma. A total of 63 healthy embryos and foetuses irrespective of their sex were collected from pregnant sheep slaughtered from local slaughter houses of Tirupati and were divided into three groups as per their estimated approximate age. The adrenal glands attained a harvestable size around 46-47 days of gestation. At this age, the adrenals were rounded and pin head shaped and pink in colour and in later stages of development the right adrenal was pyramidal and left adrenal was bean shaped. The left adrenal was heavier, thicker and longer than the right adrenal gland in all groups. The primordium of the adrenal was first noted in 38 days old embryo and was placed cranial to metanephron and ventral to aorta. At 54 days of gestation, thick connective tissue capsule was observed. Collagen fibres, reticular fibres and nerve fibres were noticed in the capsule. However, elastic fibres were not noticed in adrenal gland through out the gestation. The mean thickness of the capsule in group II was 69.196μm ± 12.97 and in group III was 96.003μm ± 16.99 respectively. At 54 days of gestation, zona glomerulosa was formed. At 75 days of gestation, two zones were observed in the cortex i.e, outer zona glomerulosa and inner zone fasciculata. The zona reticularis is not distinctly seen in all the age groups. The thickness of the cortex increased steadily with the age of the foetus. The migration of medullary cells through the capsule was noticed at 60 days of gestation. At 100 days of gestation distinct medulla was observed in the centre of the gland. The chromaffin granules number and their size increased as the age advanced. Noradrenaline and adrenaline producing cells were also observed in the medulla. A large medullary vein was noticed in the centre of the gland. Histochemical studies of adrenal gland revealed that glycogen content was more in cortical cells especially in glomerulosa cells. The capsule showed intense positive reaction for PAS whereas cortex and medulla showed moderate to weak PAS reaction. In the present study, an intense reaction for acid mucopolysaccharides was observed in cortical trabeculae. The reaction for acid mucopolysaccharides was very weak or even absent in adrenal parenchyma. The capsule and medulla were completely devoid of lipids whereas cortex showed moderate reaction. The capsule and cortex showed intense reaction and medulla showed moderate reaction for alkaline phosphatase. The capsule and cortex showed weak to moderate reaction and medulla showed intense reaction for acid phosphatase in all the age groups. | en_US |
| dc.identifier.uri | http://krishikosh.egranth.ac.in/handle/1/5810084900 | |
| dc.keywords | SHEEP; ADRENAL GLAND;PRENATAL DEVELOPMENT | en_US |
| dc.language.iso | en | en_US |
| dc.pages | 142 | en_US |
| dc.publisher | SRI VENKATESWARA VETERINARY UNIVERSITY TIRUPATI - 517 502. (A.P.) INDIA | en_US |
| dc.sub | Veterinary Anatomy | en_US |
| dc.subject | null | en_US |
| dc.theme | STUDY ON PRENATAL DEVELOPMENT OF ADRENAL GLAND OF SHEEP (Ovis aries) | en_US |
| dc.these.type | M.V.Sc. | en_US |
| dc.title | STUDY ON PRENATAL DEVELOPMENT OF ADRENAL GLAND OF SHEEP (Ovis aries) | en_US |
| dc.type | Thesis | en_US |