I am in a discussion with a theist and he gave me a very weird question indeed.. one that I find a bit moronic and yet a bit interesting.. I then thought about it and I really don't know.. I am not a scientist but am interested in this area.. so if anybody has the slightest ides about this question.. much appreciated. Which evolved first, the human skin, blood, or the human heart? To me is seems like they all evolved together.. simple answer but from my current knowledge that seems correct.