i've been arguing about the color of blood with my girlfriend,so is blood red or blue????
484554
Oxygenated blood is bright red (the color when you get a cut and bleed), unoxygenated blood is brick red-the color of the blood in the tube when you get blood drawn.  Veins and arteries are *not* blue- there isnt anything colored blue in the circulatory system.  The reason the veins look blue is because of the effect skin has on preferentially letting certain colors through (blue) and blocking others (yellow and red).  So when you look at your veins, you are looking through a colored filter-the skin.\nWith carbon monoxide, blood becomes almost neon-red.
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
664440
Red is for temporary handicap. Like a broken leg..foot..they are usually only good for a month or two. The blue are either good for years or lifetime & just need to be renewed. My brother-in-law got a red one after back surgery....my Dad has a blue one....
894834
To differentiate it from red which is called red.\n(joke couldn't resist)\nI think there is no reason for the word blue except whoever was in charge of naming words named it blue.\nDo you like it?\nThere was a game book where they made up a condition of life and then named it.Very funny and we who read  it could relate.  For instance a person who likes to practice outer body experience just before he has sex might be called........voyeur. or  retroactive.\nSo you might try this yourself. when intrigued by a certain condition of life.
172271
Red because it can represent so many things. Love, passion, anger, chaos etc.
186686
Color is only skin deep. Everyone bleeds red blood, so what is your hang up, you scared someone will say something that is going to hurt your feeling and you get to crying.
821922
it depends how much blood you have, if there's a lot, then it will appear a brick red color, but if its not so much, then it looks bright red untill it dries, then its brick red once again
851130
usually slightly blue due to superficial vein over there.if really green did u have bleeding or bruise couple of days back.if not i am not sure.
504422
First off ignore those claiming that the blood in your veins is blue. The blood  everywhere in your body is red, always. All the time. It is never blue. Any blue colour is an illusion it is just an illusion.. Blood fresh from the lungs in bright red, blood in the veins is dark red. But blood is never any colour but red unless you have been poisoned and are about to die.\n\nThe blood that you can see in the veins under your skin appears to be blue because the skin and the vein itself absorbs red and yellow light preferentially. That means that only the blue light returns to your eye. But it is entirely an illusion, and the blood in the veins is a dark red colour.\n\nAnyway, the reason that the blood is red is because it contains red blood cells, and red blood cells in turn are packed with a molecule called haemoglobin. Haemoglobin is a red colour, and that is what makes blood red.
525270
They have blue blood, which is a result of its high content in copper-based hemocyanin instead of the iron-based hemoglobin which is red.
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)
55332
Blood in the human body is both red and blue. Red blood is oxygenated blood and blue blood is deoxygenated blood. \n\nHowever, all blood outside of the body is red because oxygenated blood is red and deoxygenated blood becomes oxygenated through diffusion instantly upon reaching the air.
587615
oxygenated blood is red. deoxygenate blood is blue, you always bleed red because blood pulls the oxygen out of the air the same way  it would in your lungs, and yes it happens to everyone
539773
No, this is a very common myth. Blood is always red. When in an oxygen poor stage it assumes a red color that is not as intense as the red of the oxygen rich stage. The blue color comes from looking at your deoxygenated blood through layers of skin as well as the veins.
80674
RED ALL THE WAY!! YOU ROCK!!
441575
Blood is not blue.  They just draw it that way in science books so you can distinguish arteries from veins.  You can take this to the bank.
659347
RED RED RED RED RED THATS THE BEST COLOR!!! RED MEAN POWER, AND RESPECT!!!!