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DEPARTMENT OF VETERINARY ANATOMY & HISTOLOGY
1. Craniometry of Asian elephant - Sexing
Jose John Chungath
Professor
Department of Veterinary Anatomy & Histology
College of Veterinary & Animal Sciences, Mannuthy, Kerala – 680 651
Email id: jjchungath55@gmail.com
National Symposium of IAVA on Recent Advances in Anatomy of the Domestic Animals with Special Reference to Developmental Anatomy. Tirupati, 21st to 23rd Nov., 2007. p. 75.
This paper deals with cranial form of the skull of Asian elephant in special reference to sexing them especially when warranted in legal cases. 26 Asian elephants’ skulls nine females and 17 maleswere studied for their selected characters and craniometric measurements. Compared with the females, the male skulls of Asian elephant had the following features:
2. Histological development and organization of the adrenal cortex in the crossbred goat
Ashok. N1, Harshan. K. R and Chungath. J. J.
1Professor
Department of Veterinary Anatomy & Histology
College of Veterinary & Animal Sciences, Mannuthy, Kerala – 680 651
Email id: drashokn@gmail.com
Proceedings of the 12th Kerala Science Congress, January, 2000, Kumily, pp-329-332.
Prenatal development of adrenal cortex in the crossbred goat was studied using 55 foetuses of varying gestational ages. Cortical primordium appeared at 33 days. By 42 days, differentiation started with organization of cells into clusters. Zona glomerulosa differentiation started by 58 days and completed by 95 days. Zona fasciculata and zona reticularis became apparent by 129 days. Rapid growth of zona fasciculata was evident after 141 days. It was concluded that the stress induced on growing foetus towards the end of gestation due to insufficiency of placenta resulted in higher activity of zona fasciculate under the influence of foetal ACTH.
3. Histogenesis of Diencephalon in Goat Foetuses
Lucy, K M. 1, Harshan. K.R., Chungath. J.J. and Ashok. N
1Associate Professor
Department of Veterinary Anatomy & Histology
College of Veterinary & Animal Sciences, Mannuthy, Kerala – 680 651
Email id: drlucykm@yahoo.co.in
Indian Journal of Animal Research, 2009, 43 4: 241-245
Histogenesis of diencephalon was studied using 46 goat foetuses ranging from 2.5 cm CRL 40 days of gestationto 41.5 cm CRL full term. By 40 days, the roof plate was converted into the tela choroidea and along with the growing blood vessels, formed the choroid plexus of the third ventricle. Proliferation of neuroblasts in localized regions of the mantle layer led to formation of nuclei in the seventh week. The nerve tracts also appeared at this stage. At 81 days the internal medullary lamina extended into the thalamus from the stratum zonale dividing it into medial and lateral portions. Supraoptic nucleus started developing towards the end of second month. Typical neurons appeared in most of the thalamic and hypothalamic nuclei during fourth month. During fifth month, supraoptic and paraventricular nuclei of hypothalamus showed bipolar cells. Histologically the diencephalon was adult-like towards term.
4. A study on the plicae of Bursa of Fabricius in White Pekin ducks Anas platyrhynchos)
Indu, V. R. 1, Chungath, J. J., Harshan, K. R. and Ashok, N.
1Assistant Professor
Department of Veterinary Anatomy & Histology
College of Veterinary & Animal Sciences, Mannuthy, Kerala – 680 651
Email id: drinduvraj@yahoo.com
Indian Veterinary Journal 200786 3:295-296
A detailed study on the changes in plicae at different stages of growth was undertaken to understand the functions of bursa. The bursa was collected from 51 White Pekin ducks at five days interval from the day of hatch up to 20 days, at weekly intervals up to 65 days and thereafter at 15 days interval up to 155 days post-hatch. The number and size of plicae and the follicles in it were maximum at 58 days of age and showed a general decrease thereafter. It was concluded that the immunological functions commenced from the fourth or fifth week in the postnatal life and it attained its peak functional activity by two months of age.
5. Histological study of renal corpuscles and juxta glomerular apparatus in Japanese quail Coturnix coturnix japonica
Sreeranjini, A. R1., Iyyangar, M. P. and Pramodkumar, D
1Assiatant Professor
Department of Veterinary Anatomy & Histology
College of Veterinary & Animal Sciences, Mannuthy, Kerala – 680 651
Email id: sreeranjiniar@yahoo.com
Indian Journal of Animal Sciences 200878 12: 1365-1367.
The study was conducted on kidneys of 25 adult Japanese quails. Fresh specimens fixed in 10% neutral buffered formalin, Bouin’s and Zenker’s solutions were processed by routine paraffin embedding techniques and sections were stained by Mayer’s haemalum-eosin-phloxine and Crossman’s modification of Mallory’s triple stain methods. Renal corpuscles were of two types-smaller and larger. Smaller renal corpuscles were in large numbers and were distributed towards the periphery of renal cortex. Larger renal corpuscles were seen closer to renal medulla and were only few in numbers. The parietal layer of Bowman’s capsule in both types of renal corpuscles was lined by squamous epithelial cells with fusiform nucleus. Visceral layer showed cuboidal podocytes projecting into the capsular space. A juxta glomerular apparatus consisting of macula densa, afferent and efferent arterioles, extra glomerular mesangial cells or lacis cells or goormaghtigh cells and juxta glomerular cells was also observed in the present study.