Assessment functional activity of thyroid gland throughout histological exploration and morphometric evaluation in Buffalo

الملخص EN

The study aimed to explain the role of histological examination and morphometric parameters to determine activity of thyroid gland as comparison with other animal.

The study carried out on twenty-two specimens of thyroid gland which taken from Al-Nasiriya abattoir.

Results pointed that thyroid gland covered by capsule which consisted from two layers, outer layer is irregular connective tissue and inner layer is regular connective tissue it sent septa which it divided lobe of thyroid gland into many lobules, also septa penetrating the lobule to diffuse around follicles.

Follicles were two types, the small follicles had high preparation in number and located in peripheral area of lobule as well as they lined by tall cuboidal to columnar epithelial cells and their diameter 23-59 Mm and 28-64 Mm dimensions were for both sides of lobe (right and left) respectively.

Large follicles had fewer propositions in number and located in central area which lined by cuboidal to squamous epithelial cells.

Also their diameter attained to 125-154 Mm and 135-166 Mm for both sides of lobules diameters.

The height of the follicular epithelium was in reserve relation to size of follicles.

The morphometric of measurement of follicular height were 6.2-11.3 Mm and 5.1-9.3 Mm for small follicle in both sides of lobe right and left respectively.

Meanwhile the height of follicular epithelium in large follicles both sides (right and left) were 2.2-3.1 Mm and 1.5-2.8 Mm respectively.Para follicular cells were present within inter-follicular space and their numbers were ranging from four to ten cells.

The study concluded the thyroid gland in buffalo characterized with higher metabolic rates them other animals as like in bovine, camel and human.

As well as the right lobe more active than left side according to categories were provided.