Résumé

This study was carried out to study the peculiarities of the topography, the macrostructure and the analysis of the structural and functional organization patterns of the parenchyma of the thyroid gland of dairy cows (local breed from the Souk Ahras region, Algeria). A complex of macroscopic and histological techniques was used, as well as immunohistochemical staining of thyroid gland sections to identify localization characteristics of thyrocyte populations in the parenchyma. The macroscopic data was highly variable, including the length, width and thickness of the gland, which appear to be greatly increased during the winter period. The parenchyma was characterized by a spongy-like structure in the form of a set of partially concave lobules, surrounded by a framework of connective tissue are represented by a capsule and a trabecular formation in the form of septa, the lobular structure is positioned from diffusely containing follicles rich in thyrocytes and bases by a complex of blood vessels. The amount of thyrocytes strongly depended on the time of the season. The structure of the parenchyma of the thyroid glands of cows was not absolutely unique, as in other species of mammals, subdivided into specialized cell areas that are connected to follicles. The histometric characteristics of the follicles show that there is a secretion activity of the very important hormones of T3 (tri- iodothyronine) and T4 (tetra-iodothyronine) during the summer period, has been proved by the results carried out by ELISA of the assay of these hormones.

Information

Item Type:	Journal
Divisions:	» Institut des Sciences Agronomiques et Vétérinaires
ePrint ID:	2764
Date Deposited:	2021-10-07
Further Information:	Google Scholar
URI:	https://www.univ-soukahras.dz/fr/publication/article/2764

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