From Sally Mann's series "What Remains". It is clear when photographing the rotting corpses on a "cadaver farm", she was still treating them as humans. There is a reverence in the portrayal of the corpse alluding to Mann's almost spiritual approach to the bodies. This series really places the viewer in the position of how to define the body (in terms of it being "human" or "non-human").
I'd certainly regard a rotting corpse as human - unless it's an animal!!