Stem cells play a vital role in repairing damaged tissue, whether it’s a scraped knee or a scarred uterus following pregnancy. New stem cell research has identified the molecules that the cells produce to promote the healing process. Stem cells play a vital role in repairing damaged tissue, whether it’s a scraped knee or a scarred uterus following pregnancy. New stem cell research has identified the molecules that the cells produce to promote the healing process. Cell & Microbiology Biotechnology Phys.org – latest science and technology news stories