Root sheath (hair)

{{For|other root sheaths|Root sheath (disambiguation){{!}}Root sheath}}

{{Infobox anatomy

| Name = Root sheath

| Latin =

| Image = Gray945.png

| Caption = Transverse section of hair follicle.

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| Precursor =

| System =

| Artery =

| Vein =

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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 mucosum (stratum germinativum and stratum spinosum){{Cite web |url=http://education.yahoo.com/reference/gray/subjects/subject/234 |title=The Common Integument - Gray's Anatomy of the Human Body - Yahoo! Education |access-date=2007-12-08 |archive-url=https://web.archive.org/web/20080119234335/http://education.yahoo.com/reference/gray/subjects/subject/234 |archive-date=2008-01-19 |url-status=dead }} 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.[http://www.answers.com/topic/trichilemmal trichilemmal: Definition and Much More from Answers.com] The IRS functions to mould, adhere, as well as participate in the keratinization of growing hair.{{cite journal | vauthors = Joshi RS | title = The Inner Root Sheath and the Men Associated with it Eponymically | journal = International Journal of Trichology | volume = 3 | issue = 1 | pages = 57–62 |date = January 2011 |pmid = 21769243 |pmc = 3129131 |doi = 10.4103/0974-7753.82119 | doi-access = free }}

References

External links

[https://www.bukclinic.com/hair-transplant-turkey/ Hair Transplant Information] Retrieved 26 June 2023
{{cite web | title = Mammal, hair (LM, High) | url = http://trc.ucdavis.edu/mjguinan/apc100/modules/Integument/hair/hair3/hair3.html | archive-url = https://web.archive.org/web/20060913064223/http://trc.ucdavis.edu/mjguinan/apc100/modules/Integument/hair/hair3/hair3.html | archive-date = 13 September 2006 | work = APC100 }}
{{cite web | title = Integument System II: Hair | url = http://education.vetmed.vt.edu/Curriculum/VM8054/Labs/Lab15/Lab15.htm | work = VM8054 Veterinary Histology | publisher = Virginia-Maryland College of Veterinary Medicine | archive-url = https://web.archive.org/web/20000118132434/http://education.vetmed.vt.edu/Curriculum/VM8054/Labs/Lab15/Lab15.htm | archive-date = 2000-01-18 }}

Category:Hair anatomy