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Root sheath
Transverse section of hair follicle.
Gray's	subject #234 1068

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;

Contents 1 Outer Root Sheath 2 Inner Root Sheath 3 References 4 External links

[edit] Outer Root Sheath

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.

[edit] Inner Root Sheath

The inner root sheath 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]

[edit] References

1. ^ The Common Integument - Gray's Anatomy of the Human Body - Yahoo! Education
2. ^ trichilemmal: Definition and Much More from Answers.com

[edit] External links

• root+sheath at eMedicine Dictionary
• http://trc.ucdavis.edu/mjguinan/apc100/modules/Integument/hair/hair3/hair3.html
• http://education.vetmed.vt.edu/Curriculum/VM8054/Labs/Lab15/Lab15.htm

v • d • e Integumentary system (TA A16, GA 10.1062) Skin Epidermis Stratum corneum · Stratum lucidum · Stratum granulosum · Stratum spinosum · Stratum germinativum (basale) Basement membrane zone Basal keratinocyte · Lamina lucida · Lamina densa Dermis Papillary · Reticular Subcutaneous tissue Panniculus adiposus · Panniculus carnosus · Stratum membranosum · Loose connective tissue · Superficial fascia Adnexa Glands Sweat glands: Apocrine · Eccrine Sebaceous Hair Outer root sheath Inner root sheath Shaft Cuticle · Cortex · Medulla · Bulb with matrix cells · Hair papilla Muscle Arrector pili Nail Matrix · Lunula · Nail plate · Eponychium · Paronychium · Hyponychium Other Skin flora integument, SF, LCT navs: anat/physio, noncongen/congen/neoplasia, symptoms+signs/eponymous, proc skin appendage navs: anat, noncongen/congen/neoplasia, symptoms+signs/eponymous, proc

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