Kidneys, heart, liver, lungs, pancreas and the small bowel can all be transplanted.
Techniques are improving all the time and we may soon be able to transplant other parts of the body to help even more people.
Electrician Martyn Gwilliam had always joked that, when he died, he wanted to donate his corneas so he could "keep an eye on the talent." Following his death in a motorcycle crash, his wishes were carried out - but both the recipients were young women!
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