Could some of you answer this very simple question ?
Background: I was watching a very nice BBC documentary about two British soldiers getting wounded in Afghanistan and coming back to the UK to basically get better. One lost vision in both eyes, to get some of it back, and lost his two legs.
The other guy lost both legs and an arm (Tom - the bloke with the most determination and courage I've ever seen - at one point he literary goes "oh yeah well, I don't mind too much about loosing the legs.. and the left arm, oh well, I didn't do much with it before anyway. I'll just find a way round it I guess - he did, he learned how to ski a year after!!).
So basically these guys get some very good prosthetic limbs after their respective operations and they actually do manage to live quite nicely after a while. I think the fact that they were young & strong & determined young men helped a lot.
ANYWAY, the question: at this point in time, how much of our body can be replaced by systems ? I'm not talking about live organs, but mechanical contraptions?
Is there such a thing as a bionic heart? Is there any prosthetic that can interface with the body's nerves? Etc..