Root sheath may refer to any of these biological structures:
*
Epithelial root sheath
The Hertwig epithelial root sheath (HERS) or epithelial root sheath is a proliferation of epithelial cells located at the cervical loop of the enamel organ in a developing tooth. Hertwig epithelial root sheath initiates the formation of denti ...
, a proliferation of epithelial cells located at the cervical loop of the enamel organ in a developing tooth
*
Root sheath (hair)
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 ...
, at the base of a hair follicle
**
Inner root sheath The inner root sheath or internal root sheath of the hair follicle is located between the outer root sheath The outer root sheath or external root sheath of the hair follicle encloses the inner root sheath and hair shaft.James, William; Berger, Ti ...
**
Outer root sheath The outer root sheath or external root sheath of the hair follicle encloses the inner root sheath and hair shaft.James, William; Berger, Timothy; Elston, Dirk (2005) ''Andrews' Diseases of the Skin: Clinical Dermatology'' (10th ed.). Saunders. Pag ...
*
Seed root sheath, root sheaths in the seeds of plants
{{disambig