Contact: Karen Kreeger
University of Pennsylvania School of Medicine
Caption: Top panels show progenitor cells marked in green (left) and brown (right) in cross section of a hair follicle. Bottom panel shows side view of hair follicle with stem-cell- and progenitor-cell-rich areas.
Credit: George Cotsarelis, MD, University of Pennsylvania School of Medicine
Usage Restrictions: None
Related news release: Male pattern balding may be due to stem cell inactivation, according to Penn study