A lung transplant can be performed on one or both lungs, or as a combined heart-lung transplant.
The lung donor is usually someone who is deceased, although in some cases, a section of lung can be taken from a living donor.
What do the lungs do?
The lungs allow the body to take in oxygen from the air, and to release carbon dioxide from the body.
The lungs transfer oxygen from the air into the blood stream, which carries it to all the other parts of the body.
The lungs fill with air which reaches the alveoli (tiny air sacs at the very end of the airways), where oxygen and carbon dioxide are transferred to and from the blood.