what structure do strands of hair originate from
These structures embryologically originate from the epidermis and can extend down through the dermis into the hypodermis. Hair. 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. The hair shaft is the part of the hair not anchored to the follicle, and much of this is exposed at the skinâs surface. The rest of the hair, which is anchored in the follicle, lies below the surface of the skin and is referred to as the hair root.