Doesn't the color of blood attract strong defenition?
553868
yes. some say it describes love, death,hell,blood (it is), rose, and other stuff
292556
You probably already know this but populations of humans were never separated well (reproductively or geographic isolation) from one another for significant changes to build up.  That said, I'm sure you know of the sickle cell trait that (to my knowledge) evolved at least twice (Africa and the Indian sub-continent).\n\nOne of the more interesting explaination I've found for skin color changes was described in an excellent article in "Scientific American," October 2002.
1067197
Blood is *never* blue.  Blood is described as dark red (venous) or bright red (arterial).  Our veins look blue because we are looking at them *through* our skin.  The blood inside them is dark red and it doesn't reflect light very well. The blood you see when you get hurt is usually venous blood. oxygen-poor blood is blue, oxygen enriched blood is red.\n\nIn humans and other hemoglobin-using creatures, oxygenated blood is a bright red in its color. Deoxygenated blood is a darker shade of red, which can be seen during blood donation and when venous blood samples are taken. However, due to an optical effect caused by the way in which light penetrates through the skin, veins typically appear blue in color. This has led to a common misconception that before venous blood is exposed to air it is blue.
425346
No...it does seem that way, though doesn't it??? Usually it's any shade of black or brown...trust me! (reffering to religious Jews-and USUALLY)
857569
It depends on the color of your blood. \n\nFor some odd reason Red State Plutocrats have Blue Blood.\n\nGo big Red Go
54111
Blood is everything!! You do not want children with problems, do you?\n\nFor your blood type, your best match is: \n\nType O\n\nA+ and B+ can cause hemogoblinia, which causes small stature in offspring and can cause clawlike hands to form\n\nA+ and A can cause 'Vampirism' which results in offspring that tends to stay out late, wear dark clothes, and engage in orgiastic bloodletting parties.\n\nO is the 'black' of blood. It goes with everything.
62314
I'm not sure what bloods you're referring to. I know the five-point star has been used as a symbol of the five elements (either earth, air, fire, water and spirit or metal, wood, air, fire, water) but I don't recall blood being part of the symbolism.
385035
Human blood is red.\noxygenated is bright red,\ndeoxygenate is dark red.\n\nslugs blood is green (funny copper story)\n\nWhen looking through the skin at something dark, it looks blue becuase of a phenomenon that red light scatters more easily and lets the blue light penetrate, therefore blue.\n\nif someone has a deep mole or melanoma, deep to certain layers of the skin, it appears to have a blue tinge.
1038235
Yes . If they have green blood
886809
i don't know; i think it is pretty stupid; if someone is watching wrestling, they are expecting blood to be involved, so changing the color really isn't necessary
1104888
In humans and other hemoglobin-using creatures, oxygenated blood is a bright red in its color. This is due to oxygenated iron in the red blood cells. Deoxygenated blood is a darker shade of red, which can be seen during blood donation and when venous blood samples are taken. However, due to an optical effect caused by the way in which light penetrates through the skin, veins typically appear blue in color. This has led to a common misconception that before venous blood is exposed to air it is blue.\n\nread more at\nhttp://en.wikipedia.org/wiki/Blood\n\n-unpredicktaboh-
799464
Blood does not need oxygen to be red.  Blood is never blue.  Just because a hose is green, it doesn't mean the water coming out will be green as well. (referring to veins)
944749
This is a point that has been taken up by those in scientific and academic circles.\n\nSo, no, you aren't the only one.\n\nNot long before I was born, it was assumed that Black blood types must be different than Whites, and Blacks who wanted to donate blood were rejected.\n\nTurns out there's no relation between blood type and race.\n\nThere have been people arguing that the whole concept of race is bogus.\n\nA few weeks ago, I caught part of a really interesting documentary on PBS of a genetics expert who was following out the migrations of humans.\n\nTurns out, everyone in Europe, most of East Asia (northern, primarily) and the Americas are related, and descended from the same small group of people -- who had first migrated to the middle of Eurasia, then some traveled west to Europe, and a very few to the Americas.\n\nThe differences that have sprung up since the separation of people into the "races" are as nothing compared to our shared traits.\n\nAnd no one is "pure" as there has been mixing ever since.\n\nNo, you're both in good company and on solid ground in finding the concept bogus.
233305
Josh has the right idea, but there's one big flaw. It's not rust. Rust is hydrated iron (III) oxide (Fe2O3). The iron in oxygen-carring hemoglobin is at a +2 state, not a +3 state. The red is not caused by rust in the bloodstream.\n\nIf the iron in hemoglobin is oxidized to a +3 state, it turns the molecule into hemiglobin or methemoglobin, not hemoglobin. Neither of those two molecules with Fe+3 states can bind with oxygen.\n\nBasically, blood is red because of the oxygenated hemoglobin. Oxygenated hemoglobin is bright red, while blood without oxygen is a darker red. It's a myth that veins carry blue blood--it's an optical effect by the skin that makes it appear blue. If you get a blood test done, they'll pull out blood from a vein which is dark red, not blue.\n\nHope this helped.
224868
fisrt purple then back to blue \n\nthe chemical reactions that occur durring oxygen deporvation would be the same causing blood vessels to flush (turning us red- them blue) then upon oxygen deprovation in the bloodstream the hemoglobin would loose its red appearance giving the blue tint (so blue skin would stay blue)\n\nThat is of course assuming smurfs where REAL !! and had simalar physiology to existing life forms
464096
Brain and hair color are little different things, no?
846877
It is a throwback to the bad, old days when they used to claim that if someone has so much as a drop of black blood, they were black.  Yes, I think it's racist, but it's become so widely accepted that I think people have forgotten about that - until someone like you poses the question.\n\nWouldn't it be nice if we didn't think in those terms at all?