Internal Epithelial Root Sheath
The internal epithelial root sheath of a hair (or hair follicle) is one of the two layers of the dermal root sheath, which is sometimes called simply the "root sheath" of a hair. The dermal root sheath of a hair consists of two layers of epidermal surrounded by an outer sheath of connective tissue.
The two layers of the dermal root sheath are:
- the external epithelial root sheath, and
- the internal epithelial root sheath
The internal epithelial root sheath consists of three layers:
- Henle's layer
- Huxley's layer, and
- an internal cuticle continuous with the outermost layer of the hair shaft.
The topic of the structure of a hair follicle is included in some courses in health sciences, including subjects such as nursing, skin care, hair care, beauty therapy and various holistic therapies.