毛囊群由2—6根粗毛组成，粗毛有独自的毛囊，每一毛囊有皮脂腺和汗腺。

Each group consists of 2-6 cover hairs, the cover hairs have follicles of their own and each of the cover hairs has sebaceous gland and sweat gland.

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目的：通过培养人毛囊外根鞘细胞群，观察其增殖活性及细胞角蛋白k 19的表达。

AIM: to investigate the expression of cytokeratin K19 and proliferation capability in cultured follicular outer root sheath cells derived from plucked human sc alp hair.

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