MICROANATOMY

Detailed explanation-1: -Overview. Each pore on the surface of the skin is an opening to a canal called a follicle. The follicle also contains a hair and an oil gland (sebaceous gland). The oil gland helps remove old skin cells, keeps the skin lubricated, and prevents drying of tissues.

Detailed explanation-2: -The sebaceous glands secrete an oily substance called sebum, which gives your hair its natural shine. Sebum keeps your hair healthy and smooth, and it keeps the hair from becoming dry and breaking. However, some sebaceous glands produce an excess of oil, which results in oily skin and greasy hair.