From one to another.

: Organ transplantation is now well established as an excellent treatment for many previously fatal diseases of vital organs. For an organ to be of use to the recipient the cells must be alive but apart from kidney and hepatic lobe donation from a close blood relative, organs are removed from dead patients. The cause of death is usually a head injury or intracerebral bleed with permanent and complete destruction of the brain stem. Thus organ donation to save a life is usually associated with a tragedy for the donors and their families.