continuous with continuous with bulb of hair follicle hair root sheath hair outer root sheath outer hair sheath ORS UBERON:0005942 EMAPA:32793 NCIT:C62490 outer root sheath of hair follicle FMA:70943 A stratified epithelium that surrounds the hair follicle that merges proximally with the basal layer of the interfollicular epidermis and distally with the hair bulb. hair follicle outer root sheath outer root sheath Wikipedia:Outer_root_sheath external root sheath of hair follicle MA:0000780 BTO:0003969 SCTID:319224003