Ultrastructure of the Thyroid Gland in Adult West African Dwarf Goat (Capra hircus)

The present study examined ultrastructure of the thyroid gland of adult West African Dwarf (WAD) goat in order to further understand the ultrastructural morphology and some of the changes in the components of the thyroid gland in goat with age. Thyroids glands obtained from fifteen adult WAD goats o...

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Autores principales:	Igbokwe,Casmir Onwuaso, Ezeasor,Daniel Nwagbo, Umar,Mohammed Bello
Lenguaje:	English
Publicado:	Sociedad Chilena de Anatomía 2015
Materias:	Ultrastructure Thyroid gland Dwarf goat
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022015000200020
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spelling	oai:scielo:S0717-950220150002000202015-08-13Ultrastructure of the Thyroid Gland in Adult West African Dwarf Goat (Capra hircus)Igbokwe,Casmir OnwuasoEzeasor,Daniel NwagboUmar,Mohammed Bello Ultrastructure Thyroid gland Dwarf goat The present study examined ultrastructure of the thyroid gland of adult West African Dwarf (WAD) goat in order to further understand the ultrastructural morphology and some of the changes in the components of the thyroid gland in goat with age. Thyroids glands obtained from fifteen adult WAD goats of different ages and sexes slaughtered at the local abattoirs were used in this study. Electron microscopic techniques were used to study the fixed tissue with emphasis on the follicular and parafollicular cells. The results showed that the ultrastructure is generally similar to that of some domestic animals. Follicular cells were cuboidal in young adult goats thyroids but were flattened in older goat thyroids of 57 years. These cells remarkably showed highly dilated cisternae of rough endoplasmic reticulum which decreased in frequency the older goats. Microvilli were short and sparse on the follicular cells and the number decreased in the older goats. Different sizes of apical vesicles of varying electron density were encountered that included colloid droplets, secretory vesicles and lysosome-like bodies and the appearance of these vesicles changed with age. Parafollicular cells were encountered in the basal position between follicular cells in all thyroids examined. Numerous dense cytoplasmic granules were observed and they were not apparently different from that described in several mammals.info:eu-repo/semantics/openAccessSociedad Chilena de AnatomíaInternational Journal of Morphology v.33 n.2 20152015-06-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022015000200020en10.4067/S0717-95022015000200020
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Ultrastructure Thyroid gland Dwarf goat
spellingShingle	Ultrastructure Thyroid gland Dwarf goat Igbokwe,Casmir Onwuaso Ezeasor,Daniel Nwagbo Umar,Mohammed Bello Ultrastructure of the Thyroid Gland in Adult West African Dwarf Goat (Capra hircus)
description	The present study examined ultrastructure of the thyroid gland of adult West African Dwarf (WAD) goat in order to further understand the ultrastructural morphology and some of the changes in the components of the thyroid gland in goat with age. Thyroids glands obtained from fifteen adult WAD goats of different ages and sexes slaughtered at the local abattoirs were used in this study. Electron microscopic techniques were used to study the fixed tissue with emphasis on the follicular and parafollicular cells. The results showed that the ultrastructure is generally similar to that of some domestic animals. Follicular cells were cuboidal in young adult goats thyroids but were flattened in older goat thyroids of 57 years. These cells remarkably showed highly dilated cisternae of rough endoplasmic reticulum which decreased in frequency the older goats. Microvilli were short and sparse on the follicular cells and the number decreased in the older goats. Different sizes of apical vesicles of varying electron density were encountered that included colloid droplets, secretory vesicles and lysosome-like bodies and the appearance of these vesicles changed with age. Parafollicular cells were encountered in the basal position between follicular cells in all thyroids examined. Numerous dense cytoplasmic granules were observed and they were not apparently different from that described in several mammals.
author	Igbokwe,Casmir Onwuaso Ezeasor,Daniel Nwagbo Umar,Mohammed Bello
author_facet	Igbokwe,Casmir Onwuaso Ezeasor,Daniel Nwagbo Umar,Mohammed Bello
author_sort	Igbokwe,Casmir Onwuaso
title	Ultrastructure of the Thyroid Gland in Adult West African Dwarf Goat (Capra hircus)
title_short	Ultrastructure of the Thyroid Gland in Adult West African Dwarf Goat (Capra hircus)
title_full	Ultrastructure of the Thyroid Gland in Adult West African Dwarf Goat (Capra hircus)
title_fullStr	Ultrastructure of the Thyroid Gland in Adult West African Dwarf Goat (Capra hircus)
title_full_unstemmed	Ultrastructure of the Thyroid Gland in Adult West African Dwarf Goat (Capra hircus)
title_sort	ultrastructure of the thyroid gland in adult west african dwarf goat (capra hircus)
publisher	Sociedad Chilena de Anatomía
publishDate	2015
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022015000200020
work_keys_str_mv	AT igbokwecasmironwuaso ultrastructureofthethyroidglandinadultwestafricandwarfgoatcaprahircus AT ezeasordanielnwagbo ultrastructureofthethyroidglandinadultwestafricandwarfgoatcaprahircus AT umarmohammedbello ultrastructureofthethyroidglandinadultwestafricandwarfgoatcaprahircus
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Ultrastructure of the Thyroid Gland in Adult West African Dwarf Goat (Capra hircus)

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