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The complete answer from the "Straight Dope"

http://www.straightdope.com/columns/read/1419/if-blood-is-red-why-do-your-ve
ins-look-blue


On 11/30/09 2:49 PM, "Stuart Kohlhagen" <[log in to unmask]> wrote:

> ISEN-ASTC-L is a service of the Association of Science-Technology Centers
> Incorporated, a worldwide network of science museums and related institutions.
> *****************************************************************************
> 
> not so much blue and red, as dark red ( non-oxygenated) to bright red
> -oxygenated.
> The "blue" veins is mostly the colour of the vessels + a little contribution
> from the darker red -slightly more purple de-oxygenated blood.
> 
> in some animals ( crustaceans) the haemoglobin uses cobalt not iron and they
> have electric light blue tinted blood....
> 
> Stuart Kohlhagen
> Manager Research and development
> Questacon
> 
> 
> -----Original Message-----
> From: Informal Science Education Network on behalf of Jonah Cohen
> Sent: Tue 1/12/2009 7:22 AM
> To: [log in to unmask]
> Subject: Blood Not So Simple
>  
> ISEN-ASTC-L is a service of the Association of Science-Technology Centers
> Incorporated, a worldwide network of science museums and related institutions.
> *****************************************************************************
> 
> OK, folks. Some debate was going on, and (go figure) online searching
> revealed much baldly contradictory info. So let me ask the esteemed
> folks of ASTC:
>  
> Human blood: blue? red? changing between the two?
>  
> Vulcans = green,
> Jonah Cohen
> Outreach & Public Programs Manager
> The Children's Museum
>  
> "The point is, with the right amount of genius and a touch of perceived
> insanity, science can conquer anything."
> 
>  
> 
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> For information about the Association of Science-Technology Centers and the
> Informal Science Education Network please visit www.astc.org.
> 
> Check out the latest case studies and reviews on ExhibitFiles at
> www.exhibitfiles.org.
> 
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Check out the latest case studies and reviews on ExhibitFiles at www.exhibitfiles.org.

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