Probably the Hulk, Marvel Comics. He has shown over time to have an even faster healing factor than Wolverine of the X-Men.
He has been shown to grow new organs with in seconds. And even heal to the point of coming back from the dead.
Aladdin is a cartoon character, not a superhero.
Commonly accepted first superhero is 'Mandrake The Magician'(1934) by Lee Falk. And the second superhero is 'Phantom'(1936) by Lee Falk. He was the first superhero to wear a costume.
The cast of Superhero - 2013 includes: Charles Hurston Darren Nowell
The cast of Superhero Divorce - 2006 includes: Alexandria Reynolds
The superhero superman is who I think says up up and away but I am not positive
the flash
The "fastest healing" part of your body is debatable, but may well be the inside of your mouth. In the normal act of eating lunch, you scrape thousands of cells away from the inside of your cheeks. By suppertime, almost all of those cells have been replaced.
the flash
Crab
Most of the Hand Bones can heal the fastest.
cheetah
The first is the tongue.
I'm not sure it is the fastest healing part but I am sure they mean just the mucous membranes lining the mouth, not the bones of the jaw.
The eye The first is the tongue
The Mouth and that means the jaw if you did not know
Infants will have the fastest pulse rate.
sino atrial nodes is the fastest intrinsic rate