Yeah, right. Naruto's cell didn't even die, they just lost, temporarily I say, some channels connecting the cells to each other. It should be no sweat for the cells to put their DNA and RNA to work and build some new protein channels to replace those lost. We just had here Kakuzu the hairy monster who could detach his hands and control them via whatever tentacles and even use those tentacles to fix other people's severed limbs, and Hidan whom you could cut to pieces and he still would keep laughing. And you tell me Naruto's cells can reproduce a few proteins? What a load of bs.