In part 4, Prof. Caplan talks about isolating mesenchymal stem cells from bone marrow using specialized; calf serum choosing different assays to prove multipotency – osteogenesis, chondrogenesis, adipogenesis; point of care with autologous bone marrow in orthopedic surgery; tissue engineering bone with lineage restricted MSCs; banking bone discarded bone marrow from orthopedic surgeries for future use;