What structure contains the root of hair fibers?

The hair follicle is a key structure that not only houses the root of hair fibers but also plays an essential role in the growth and development of hair. It is a tubular invagination of the epidermis, which extends deeper into the dermis. The follicle is where the hair root, which is the part of the hair embedded in the skin, is found.

Within the follicle, the root of the hair is surrounded by the inner and outer root sheaths. The follicle is responsible for the production of hair and is actively involved in various phases of the hair growth cycle. Other components associated with hair include the hair bulb, where the hair originates and grows, the hair shaft, which is the visible part of the hair above the skin, and the dermal papilla, which provides nutrients and signals to the hair follicle; however, only the hair follicle contains the root itself. This distinct function emphasizes the crucial role of the hair follicle in hair formation and sustainability.