A Comparative Histological and Histochemical Study of the Neck, Abdomen, and Tail Regions of Skin in Gazella Subgutturosa
A Comparative Histological and Histochemical Study of the Neck, Abdomen, and Tail Regions of Skin in Gazella Subgutturosa
Khalid Hadi Kadhim1*, Iman Mousa Khaleel2, Firas Abbas Hussen3
ABSTRACT
The study was conducted to compare between histological and histochemical characteristics of different skin regions (neck, abdomen and tail) responsible for the protection, sensory, thermoregulation and excretion in Gazella subgutturosa. Twenty skin samples from 10 males and 10 females of Gazella subgutturosa were collected from the ventral, lateral and dorsal parts of the neck, abdomen and tail regions. The results of thickness of epidermis in male appeared greater than in female, while the neck skin showed the maximum thickness in epidermis. The epidermis was a thin portion and composed of four layers: stratum basal, stratum spinosum, stratum granulosum and stratum corneum. The stratum basal was consisted of columnar cells and melanocytes. Whereas, the stratum spinosum was consisted of polyhedral cells. As well as, the stratum granulosum was appeared containing several layers of cells with lipid granules. While the stratum corneum was covered by keratinized stratified squamous epithelium in all regions of skin (neck and tail) except in abdomen was non-keratinized. The dermis of the abdomen skin of males was thicker than in females, while the dermal thickness of females in both neck and tail skin was higher than in males. The results of hypodermis showed high loose connective tissues and adipose tissues. Whereas, the tail region was contained a large amount of skeletal muscle fibers. Furthermore, sweat and sebaceous glands had a positive reaction to Periodic Acid-Schiff staining, while with alcian blue stain appeared sebaceous glands only. From this study concluded the layers thickness of Gazella subgutturosa skin were differed according to the body regions and gender. As well as, the skin acted as a protective barrier by utilizing its diverse cellular coalition.
Keywords | Skin, Gazelle, Histological, Histochemical staining, Periodic acid-schiff (PAS) staining
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