...
Actually Cuno, I saw on Discovery Channel a while back, they were able to replace a guys larynx! The guy got in a motorcycle accident (basically some "trickster" hung a wire between two trees, and he rode into it and damaged his throat.) They took a larynx from a dead guy and put in the guy with the damaged throat. He was actually able to speak normally after some rehab. So larynx transplants can be possible as far as I know. But there wouldn't be much use for it anyways.