Histomorphological and histochemical studies of the Sebaceous gland of skin of Black Bengal goat

Abstract

This study was carried out to see the regional and age-related histomorphological variations of the sebaceous gland of the Black Bengal goat. Study population was divided into pre-pubertal, pubertal and adult age groups. Tissue samples were collected from four anatomical regions; neck, thorax, abdomen and loin each having three sub-regions namely dorsal, lateral and ventral. Samples were examined by using a standard histological technique. The skin of the Black Bengal goat has two layers, the outer epidermis, and the inner dermis. The epidermis is composed of stratified squamous epithelium and comprises 4 layers where stratum lucidum was absent in all three age groups. The dermis comprises two layers, papillary and reticular dermis, and contains skin appendages like hair follicles, sebaceous gland and sweat glands. The diameter of the sebaceous gland doesn’t maintain any specific enlargement pattern. The maximum diameter of the sebaceous gland was 26.67±4.6 µm. The density of the sebaceous gland varied among the twelve body regions and was highest in the neck and lowest in the loin region. Among all the twelve regions of the study, the long diameter (LD) of the sebaceous gland is highest (26.67±4.60 µm) in the abdomen lateral and lowest (7.5±5.24 µm) in the thorax ventral sub-region. The short diameter (SD) also maintains a similar pattern; highest (23.33±4.15 µm) in the abdomen lateral and lowest (5.42±4.67 µm) in the thorax ventral sub-region. The sebaceous gland of the neck ventral, thorax dorsal, thorax lateral, thorax ventral, loin lateral, and loin ventral is increased with the advancement of age. Whereas neck dorsal, neck lateral, and abdomen lateral sub-region is decreased with the advancement of age. But the rate is not significant. The present study concerning the sebaceous gland varies significantly according to different anatomical regions and ages. These results could provide significant consideration for the sorting of raw skin to produce quality leather.