User blog:Jack Pistol/Immortal Dovahkiin?

I just had a random thought, and I am not sure whether it has been discussed or resolved yet, so let me put it up for discussion in this blog.

If dragons are immortal, and the Dovahkiin has the blood and soul of a dragon, then why is he not immortal?

I will quote some text from the Dragons (Lore) page: "they are ageless and immortal, with their souls enduring beyond physical death".

So, if Dragon's souls are immortal, then should the Dragonborn's soul not be so as well? We know for a fact that Dragonborns are not immortal, as the Dragonborns of the past have long since died. The Dragonborn can also be killed in the game, so that also strengthens the fact that they are immortal, and the Dragonborns of the past were not merely a hoax.

It also seems very likely that dragons are in fact immortal, or very close to that. When Alduin is killed by the Dragonborn, his soul is not released and many speculate that it is due to the fact that Alduin is not truly dead, although these are simply assumptions. When the Dragonborn kills a dragon, their soul is absorbed and therefore their soul does not leave Nirn, but rather in a way moves to a new form. I am just throwing some points around here, and most is speculation. Dragons like Paarthurnax have also been alive for centuries and those who have not been around were resurrected by Alduin.

Possibilites?

 * 1) I read somewhere that a common term for Dragonborn is "mortal dov", so that would mean they have the soul and blood, but not the immortality.
 * 2) Dragons are not immortal, just live long.
 * 3) The Dragonborn's soul never truly "dies". Perhaps it moves on to one of the next Dragonborns or remains in some form of limbo before the next Dragonborn is born. This can be questioned, as their is evidence that more than one Dragonborn may have lived at one time (the old Emperors and their heirs), but perhaps (and I am probably jumping to conclusions) because they are family they share the essence, or it is divided when giving birth to the heir? Perhaps there may be more than one soul, but if so where are the others if they are immortal?
 * 4) If you have any other suggestions, let me know in the comments.

This is my first blog here, so please forgive me if it is sloppy or I have a few incorrect facts. Discuss this in the comments, and perhaps a few more possibilities could be added.

Thanks!