Wikipedia.com

Color

In humans and other hemoglobin-using creatures, oxygenated blood is bright red. 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 colour. This has led to a common misconception that venous blood is blue before it is exposed to air. Another reason for this misconception is that medical charts always show venous blood as blue in order to distinguish it from arterial blood which is depicted as red on the same chart.

The blood of horseshoe crabs is blue, which is a result of its high content in copper-based hemocyanin instead of the iron-based hemoglobin found, for example, in humans.

SWhisssper

Wikipedia.com

Color

In humans and other hemoglobin-using creatures, oxygenated blood is bright red. 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 colour. This has led to a common misconception that venous blood is blue before it is exposed to air. Another reason for this misconception is that medical charts always show venous blood as blue in order to distinguish it from arterial blood which is depicted as red on the same chart.

The blood of horseshoe crabs is blue, which is a result of its high content in copper-based hemocyanin instead of the iron-based hemoglobin found, for example, in humans.

Reference: Blood.

I win :P...

MeAgaintsTheWorld

I may be a bit late for saying this but i just want to let all of you know that i apologize for being AWOL and not posting sh*t but you kinda lose track of time when you are at brink of being K.I.A by the enemy, eating snakes and squirrels while avoid being P.O.W (and believe me, you don't want that 'cause those russians will make ANY american-blooded person wish they had lost the "space race"...), and fighting an obnoxious walking tin can while trying not get smashed. But hey, that's what you gotta put up with when you impersonate your avatar who ,by the way, has a serious case of "Rambo Superioty Complex" and the president would probably kick him out of retirement even if he was institutionalized with Post-Traumatic stress disorder for thinking he's
Vash the Stampede or something on the battlefield =D. So thats that and since this is a random talk section, all i gotta say is that if no one understood my gibberish, i don't care. I'm high.
(just kidding XD)