Histological Study of the Thyroid and Parathyroid Glands in Iraqi Buffalo "Bubalus Bubalis" With Referring to the Seasonal Changes

Morphological Description and Histological Study of Thyroid Gland in Felis catus (Linnaeus,1758)

“…While the studies of the thyroid gland in Indian buffalo [20], the black Bengal goat [21] and rabbit [22] observed that the thyroid gland consists of three layers: outer, middle, and inner layers, whereas this study showed that the capsule consists of two layers, an outer and inner layer, and a layer of fatty tissue interferes with the outer layer. This is consistent with the findings of the guinea pig [14], Hussin and Al-Taay's [23] study on Iraqi buffalo, domestic rabbits [24], and other studies.…”

“…The follicles contain a colloid material in the follicular cavity, and some follicles are filled with colloid, while others contain a small amount, while other follicles lack this substance; this is in agreement with previous studies, including the study in wild African grusscutter [10], Weasel (Herpestes javanicus) [12], guinea pigs and albino rats [14], and Iraqi buffaloes [23]. These studies are consistent with the current study in the domestic cat, and they certainly come with a plan for histological structure and physiological composition.…”

“…The results of this study showed that C-cells are spherical to oval in shape, large in size, with dark circular nuclei, and light-colored cytoplasm, and they appeared clearly with hematoxylin-eosin (H&E) and PAS staining. This is consistent with previous studies, including the study of [11,12,14,16,21,23]. However, another study revealed the inconsistency with other studies in regards to distinguishing C-cells using routine stains, so their detection is limited by using histological and immunological techniques [7].…”