الفهرس 
Introduction and of the workOnly 14 pages are availabe for public view
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Abstract
The hair follicle is a sac like structure that surrounds the hair root it is found below the skin and has very small blood vessls giving it nourishment sebaceous glands surrounding the hair root secrete oil sebum while salt water perspiration is secreted from nearby sweat glands the sebum oil protects the hair and keeps is shiny and waterproof while the sweat is a way for the body to cool down if it’s too foot.