User blog:Sky Above,Voice Within/Dovah Sos Inconsistency?

So, most of the Dragonborn legend tells us he's a mortal with the soul and blood of a dragon; the thing is,i'm okay with the soul part,it's the blood part that is eating my entrails.How in Oblivion can the Dragonborn have the blood of a dragon and the blood of a vampire and/or werewolf at the same time without one negating the other?