A HISTOMORPHOLOGY OF THE ONE HUMPED CAMEL (Camelus dromedarius) THYROID GLAND.

Abstract

An anatomical study involving the thyroid glands of 15 healthy camels (Camelus dromedarius) of different sex group A (Males) and group B (Females), were investigated under for gross and microscopic anatomy. Gross studies revealed that thyroid glands were located in between the third ring of trachea and the laryngopharynx portion of the pharynx and had two lobes, connected by an isthmus. They appeared to be reddish brown in colour. The values of weight, length, width and diameter of thyroid glands were show no significant difference between the groups (P>0.05). Histological observation revealed that the thyroid gland consisted of a connective tissue capsule and trabeculae were found extending from the capsule into the substance of the gland, which divided it into lobules. Each lobule consisted of two sized follicles in variable numbers, the large and small. The large follicles were lined by low cuboidal epithelium, while the small follicles were lined by high cuboidal to columnar epithelium. The follicles had colloid material in their lumen, probably an apocrine secretion from the lining epithelial cells. There was no evidence of Parafollicular or C-cells in thyroid glands of camel.