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:

1. Henle's layer
2. Huxley's layer, and
3. an internal cuticle continuous with the outermost layer of the hair shaft.

• The Structure of Skin
• Functions of Skin
• Accessory Structures of Skin
• Hair Follicle