1. 1.Disease: heart, kidney, liver 2.Trauma 3.Environment: x-rays, 2 nd hand smoke 4. Aging 5.Congenital Defects: cleft palate, heart

2. 1.Drug therapy 2.Surgery 3.Transplants

3. WIRED SCIENCE | Body Builders Growing Body Parts - 60 Minutes Re-gen Revolution  1997- University of Pittsburgh organized first meeting to discuss human tissue regeneration/leaders in the WORLD!  Scientists from all over world attended/still occurs yearly  Main goal: repair damaged tissues, not replace entire organ, but today working on generating new organs