Root sheath

Root sheath may refer to any of these biological structures:

• Epithelial root sheath, 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 that is closely adherent to the root of the hair
  • Inner root sheath
  • Outer root sheath
• Seed root sheath, a protective layer of tissue that surrounds the radicle in monocotyledon seeds