I have no idea on their lifespan. I always viewed them as a step previous to
non-nucleated RBC's (which only mammals have). As far as I can figure, they
are less effective in carrying oxygen (part of their volume is occupied by
the nucleus) and are less flexible (thus more fragile) and offer more
resistance to flow than mammal RBC's.


Siyami Karahan ha escrito:

>  Dear histonetters:
>
>  Does anyone know what are the life spans of red blood cells in birds and
> fish? what kind of advantages does a nucleadted blood cell have?
>
>  Thank you
>
>  Siyami




--
Hugo Fernandez < ivha23@blues.uab.es >

U.D. Histologia i Anatomia Patologica
Facultat de Veterinaria
Universitat Autonoma de Barcelona
08193 Cerdanyola del Vallis
ESPAQA

Tel. 93 581 31 45
Fax. 93 581 20 06