Where does bird blood come from?

[Anura]

This seemed like the most likely place to ask a question about bird anatomy. So here's my question.

 

If birds have hallow bones and blood cells are created in the bone marrow. Then; Where do birds manufacture thier blood cells at? thank you all.

[Inquisitive Stone]

I think that even though the bird's bones are hollow, the red blood cells are still produced there. There actually still is bone marrow in birds however it takes up less space than it would in most mammals and there are air pockets so that the bird is light enough to fly.

[Anura]

So then bird bones are not completely hollow. Makes sence.

[Lycaenid]

Yes. Bones which are in birds, are not completely hollow. They only have many large cavities filled by air. Something like slice of honey.

Edited December 18, 2010 by Lycaenid

[Ahsan Iqbal]

When I was in the 8th standard, I remember reading something like there is an air pocket associated with the respiratory system of birds that allow it to breath more efficiently and when filled with air, it takes the space between the bones.

 

Now what is that air pocket, I don't understand and neither do I remember the details.

Probably someone here can explain this.

[Moontanman]

I found this on google.

 

http://www.earthlife.net/birds/breath.html