Seasonal Study for Histological Characteristics of Dermal Glands in Cows

Abstract

This study aimed to investigate the histological structure of the skin glands (i. sweat and sebaceous glands) in different regions of the cow's skin and its changes during winter and summer seasons. The total thickness of the skin, depth of the glands and their density in different regions for both seasons were determined. The highest thickness of skin was in the abdominal region in front of the navel during winter (2722 µm, while, it was its lowest in the region of the mid-dorsal surface during summer, which was 1690 µm). The sebaceous gland depth was the highest in the abdominal region in front of the navel during the summer a (849 µm). However, the lowest depth of sebaceous gland was in the region of the dorsal surface during the winter (712 µm). It the presence of larger hair follicles was during the summer than the winter. The largest diameter for the sweating unit was in the abdomen in front of the navel during the summer (187 µm). However, the smallest diameter was in the mid-dorsal surface region during winter (174 µm).