Root sheath (hair)
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| Root sheath | |
|---|---|
 Transverse section of hair follicle. | |
| Anatomical terminology |
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
The outer root sheath corresponds with the
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
The inner root sheath (IRS) consists of:
- a delicate cuticle next the hair, composed of a single layer of imbricated scales with atrophied nuclei;
- Huxley's layer
- 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
- ^ "The Common Integument - Gray's Anatomy of the Human Body - Yahoo! Education". Archived from the original on 2008-01-19. Retrieved 2007-12-08.
- ^ trichilemmal: Definition and Much More from Answers.com
- PMID 21769243.
External links
- 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.