Yeah, it's kind of confusing.Azuaron said:John Funk said:"Some of the most convincing experiments were the early ones," he says. "We drew each other's blood, mixed it in a test tube with the microparticles, and watched blue blood turn immediately red, right before our eyes."Yeah... now I'm confused. I learned in school that vein blood was blue, then in college that it wasn't really and people were just mistaken. I've also given blood to the Red Cross, and they pull that from your veins into a vacuum (so no oxygen addition), and it's definitely not blue.Farther than stars said:Maybe someone can explain this to me. I've never really been good with how the pigmentation of blood works. There isn't any actual "blue" blood, right? Or is it possible to make blood appear blue in an oxygen-free environment?
So I looked it up. [http://scienceblogs.com/gregladen/2008/02/11/is-blood-ever-blue-science-tea/] If by "blue" you mean "darker red", then it sounds like blood can be blue. But if by "blue" you mean, you know, "blue", then no, that's just the vein color.
I don't know what Kheir is talking about. He's either assuming people think de-oxygenated blood is blue and speaking appropriately, totally unclear about the meaning of color, or he dyed the blood.
Or I've been lied to by the internet.
As I understand it, blood is red all the time due to the fact that (aside from the plasma which has very little colour) it's almost entirely made of red blood cells. The shade of red varies from bright red (oxygenated) to dull red (deoxygenated).
Veins on the other hand are...also red. They just look blue because of the light refracting through the skin. If you were to pull one out it would normally look red. At least, I think thats how it works as far as I can remember.