pig parts
We already use pig parts on people. A large number of heart valve replacements are done with pig valves. Each valve has an average life of a little over ten years, some longer. Otherwise a mechanical valve is used. An advantage of the pig valve is that no blood thinners are needed for the long-term as they are for a mechanical valve (such as the St Jude valve).
Pig organs as replacements for human organs do sound good for those people who need a transplant but will die without one. They don't work any better than human organs, but they might keep some people alive for a while longer when a human organ is not available. The most promising shot for the pig organ is the liver. Healthy human livers for transplant are REALLY hard to come by. But heck, you could work a package deal, buy the whole pig, and have a big ol' sandwich after you got out of the hospital. (gross --- I know).
Doc is kinda gettin out there with issues. Doc: do you need a heart or a liver? I'll keep my eyes open for some organs.
Just my medical 2 cents.
Bomb on ladies and gentlemen
Fritz