Hair is a protein filament that grows from follicles found in the dermis. Hair is one of the defining characteristics of mammals. The human body, apart from areas of glabrous skin, is covered in follicles which produce thick terminal and fine vellus hair./hairdresserstylinghairGettyImages-723502603-5b31078f3de423003691e158.jpg)
Hair is made up of two separate structures. The hair follicle is the part below the skin, and the hair shaft is what you see above your skin. The hair follicle is where your hair begins to grow and is held in place. It’s a stocking-like structure that starts in the epidermis, your skin’s top layer.
Hair follicles originate in the epidermis and have many different parts. Hair is a keratinous filament growing out of the epidermis. It is primarily made of dead, keratinized cells. Strands of hair originate in an epidermal penetration of the dermis called the hair follicle.