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Open Access
Copyright: The authors. This article is an open access
article licensed under the terms of the Creative Commons Attribution License
(http://creativecommons.org/licenses/by/2.0) which permits unrestricted use,
distribution and reproduction in any medium, provided the work is properly
cited.
Research (Published
online : 18-11-2013)
23. Histomorphological study of the parathyroid gland
in female Kuttanad ducks (Anas platyrhynchos domesticus) - Firdous
Ahmad Dar, S. Maya, Jose John Chungath, N. Ashok, Harshad Sudhir Patki and K. S.
Prashanth Kumar
Veterinary World, 6(11):
941-944
doi:
10.14202/vetworld.2013.941-944
Abstract
Aim: The present work was
targeted to form the baseline data of normal morphological and
histological picture of parathyroid gland in female Kuttanad
ducks.
Materials and Methods: A Histomorphological study of the
parathyroid gland was carried out in twelve adult female Kuttanad
ducks (Anas platyrhynchos domesticus) of 20 weeks of age. Birds
reared semintensively were procured from Kerala Veterinary and
Animal Sciences University Poultry and Duck Farm and sacrificed
humanely. Glands were collected and gross parameters were
recorded. The glands were fixed in 10 percent neutral buffered
formalin. The small sized glands were processed as such by routine
histological methods, paraffin blocks were prepared and sectioned
to a thickness of 5µ. The tissues were stained by Haematoxylin and
Eosin (H&E) for routine histological studies and Gomori's rapid
one step trichrome method for connective tissue fibres.
Micrometric parameters were recorded using ocular micrometer.
Results: Parathyroid glands in Kuttanad ducks lay just
caudal to the division of the innominate artery into the
subclavian and common carotid arteries. Parathyroids were oval to
spherical in shape, yellow in colour and smaller than thyroid
gland of the representative sides. The arterial blood supply was
from common carotid artery and blood from gland was drained
directly into jugular vein. Although it lied close to the thyroid,
thymus and ultimobranchial gland, parathyroid tissue did not merge
to any of the above mentioned three glands. Parenchyma was
composed irregular anatomizing cords of cells supplied by
connective tissue stroma penetrated by blood capillaries.
Parenchyma was predominantly made of lightly stained cell, the
chief cell. The nuclei were round and contain one or two nucleoli.
Oxyphil cells present in parathyroid glands of other mammals were
not seen in the present study.
Conclusion: Histomorphological features or characteristics
of Parathyroid gland in Kuttanad duck were studied. Cranial
parathyroids were larger in size as compared to the caudal
parathyroids. Parathyroid glands were enclosed by a well-developed
connective tissue capsule made predominantly of collagen fibers.
Parenchyma was composed of irregular anatomizing cords of cells
supplied by connective tissue stroma and penetrated by blood
capillaries. Oxyphil cells were absent similar to other aves.
Parathyroid gland is very vital in maintaining the homeostasis of
the plasma calciumReference?. Findings of this study will
contribute to the anatomy literature as a valuable resource for
future researchers focused on this subject and will also help
other allied subjects on comparative basis.
Key words: chief cells, Kuttanad, parathyroid
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