What is the definition or description of: transplant?

From another: Transplant usually implies from another person, as in allograft in bone surgery, c spine l spine fusions. Think of transfusion, blood from another person.

Transfer: In medicine: a transfer from one body or body part to another of an organ (liver, heart, lung, kidney, pancreas bowel) or tissue (hand, face, hair). The immune system fights foreign invaders (like infections) so it will reject transplants from other people (allotransplants) because they look like infections. So transplants usually require drugs to prevent this (immunosuppressive medications).