User blog comment:Jack Pistol/Immortal Dovahkiin?/@comment-5051146-20121001013138/@comment-3492791-20121001060129

Think outside your realm of perception. When the Dragonborn kills a dragon they take it's soul, thus "killing" the body. However if you put the soul back, it's the same "person" as before. We've seen Aludin do this tons of times. Every time he resurrects a dragon a skeletal on comes out, and when given back it's soul, the body regenerates to it's previous condition.

Makes you wonder what was up with that skeletal dragon in labyrinthine...