EMBRYONIC DEVELOPMENT & STEM CELL COMPENDIUM
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Hair
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Outer Root Sheath
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Outer Root Sheath Cells (ORS)


Hair.ORS.ORSCs
Outer root sheath cells form an envelope enclosing the entire hair follicle. These cells express the Keratin 14 specific for the basal layer, and the Keratin17, specific to the outer root sheath.

Bulbous peg stage (stages 6-8).
Prenatal - Postnatal
Outer Root Sheath Cells
Multiple Ancestors Single Ancestor No Descendants Develops from Part of Parent