Article: SKIN BIOLOGISTS REPORT BIPOTENCY IN PROGENITOR CELLS: BESIDES GROWING HAIR, HAIR FOLLICLE STEM CELLS RESTORE ABRADED, ABLATED EPIDERMIS.

Say your adolescent child enjoys an aggressive lifestyle, and is competing in this year's Junior Olympic Games for a medal in the skateboarding or roller-blading event. He or she risks a truly abrading experience, but if the scrape doesn't penetrate too deeply, the excoriated epidermis can call in specialized cells that will allow for skin repair.

Those standby cells lie densest in the 100,000 to 150,000 hair follicles that pave the adult human scalp, but they also deploy wherever in the body hair grows. The few hairless regions occur on the palms and soles of hands and feet, plus limited areas of male and female external genitalia.

Deeper than ...

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