GENERAL HISTOLOGY

Detailed explanation-1: -Strands of hair originate in an epidermal penetration of the dermis called the hair follicle.

Detailed explanation-2: -Accessory Structures. Accessory structures of the skin include hair, nails, sweat glands, and sebaceous glands. These structures embryologically originate from the epidermis and can extend down through the dermis into the hypodermis .

Detailed explanation-3: -The formation of hair follicles occurs during embryogenesis and relies on a series of signals sent between dermal cells and overlying surface epithelial cells that cause fate changes in both cell populations, ultimately resulting in differentiation of the hair shaft, root sheaths, and dermal papilla (Hardy, 1992).