Contents

Root sheath (hair)

For other root sheaths, see Root sheath.

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Root sheath
Transverse section of hair follicle.
Anatomical terminology [edit on Wikidata]

The inner or epidermic coat of the hair follicle is closely adherent to the root of the hair, and consists of two strata named respectively the outer and inner root sheaths.

Outer root sheath[edit]

The outer root sheath corresponds with the stratum mucosum (stratum germinativum and stratum spinosum)^[1] of the epidermis, and resembles it in the rounded form and soft character of its cells; at the bottom of the hair follicle these cells become continuous with those of the root of the hair.

Inner root sheath[edit]

The inner root sheath (IRS) consists of:

1. a delicate cuticle next the hair, composed of a single layer of imbricated scales with atrophied nuclei;
2. Huxley's layer
3. Henle's layer

The term "trichilemmal" refers to the outer root sheath.^[2] The IRS functions to mould, adhere, as well as participate in the keratinization of growing hair.^[3]

References[edit]

External links[edit]

• Hair Transplant Information Retrieved 26 June 2023
• "Mammal, hair (LM, High)". APC100. Archived from the original on 13 September 2006.
• "Integument System II: Hair". VM8054 Veterinary Histology. Virginia-Maryland College of Veterinary Medicine. Archived from the original on 2000-01-18.