Question about orochimaru

[MemnochTheCaT]

I think the only reasonable explanation is that he just pulls the contract out and adds the newly aquired blood to it .. that way he could (A) - Keep his summons, and (B) - Take advantage of bloodline abilities of his newly aquired body

[originalkrn]

maybe kishimoto ( i think thats his name ) wasn't even thinking about it XP. It might just be something that shouldn't be discussed.
however, if he was.... Oro's blood may just stay the same even if he does a body transfer. All blood is probably the same and the person's "soul" is what makes it individual. So when Oro's soul is transfered into a new body, the blood becomes identified as his.