Wikipedia has this to say about Organ Transplant:
An organ transplant is the moving of a whole or partial organ from one body to another (or from a donor site on the patient's own body), for the purpose of replacing the recipient's damaged or failing organ with a working one from the donor site. Organ donors can be living, or deceased (previously referred to as cadaveric). Organ transplants can be categorized as "life-saving", while tissue transplants are "life-enhancing".
Organs that can be transplanted are the heart, kidneys, liver, lungs, and pancreas. Tissues include bones, tendons, cornea, heart valves, veins and skin.
I my own case it was the heart. After suffering from a relatively rare heart disease for three and a half years, a heart transplant was the only thing that could save my life. Luckily for me, there was a person who had agreed to become an organ donor in case the worst should happen to him/her. I feel the greatest respect and gratitude towards this person and his/hers family for this act of human kindness and solidarity. Since I have been the lucky recipient in this case, it also befalls upon me to encourage other persons to make arrangements so that in case the worst should happen to them, their organs is placed at the disposal of others in need. How such arrangements are made varies from country to country. Your doctor should be able to tell you.
I got the heart on the picture from my youngest daughter shortly after my operation. "You can have this heart as a spare".Two to three weeks after my operation she turned eleven. Her dad couldn't be there. He was when she turned twelve.