What colour is blood?
339910
I would say red.  The brighter red the colour of the blood, the more oxygen it carries. The darker its color, the less oxygen it carries.  Arterial blood is generally a brighter red because it has recently passed through the lungs. Venous blood is generally a darker red because it has passed through the capillaries where the oxygen is transferred from the blood to the tissues.\n\nSome people think that blood inside the body is blue but this myth probably started when someone drew a chart of the human blood system and colored the arteries red and the veins blue. This myth has been around a long time and seems to have a life of its own.
637537
It's actually a bluish-green.  Look at your veins that come to the surface of your skin.  Blood only turns red when it comes into contact with oxygen.
60555
The blood of most animals you are familiar with is red.\n\nYou are most familiar with oxygenated blood which is bright red. When you cut yourself the blood that leaks out is in contact with oxygen in the air and becomes oxygenated.\n\nDeoxygenated blood is a darker red.\nThe deoxygenated blood in veins is NOT visible just by looking at your skin. What you are seeing is the colour of deoxygenated blood viewed through the layers of tissue of the vein walls.\n\n'Blue blood' does not exist except for convenience in diagrams to distinguish it from the oxygenated blood in other parts of the diagram. The other common misconception is the use of 'blue blood' to describe aristocracy - cut of their heads and there is lots of bright red blood!\n\nHOWEVER - there ARE some animals (but none you are likely to have heard of) that do have blue blood - the oxygen is carried on copper rather than on iron.
117755
Actually blood would be red, the bluish appearence on Earth is a bit of an illusion with the nature of the veins (i forget the details).\n\nSo, the blood would be red, I would think.
335943
Okay.... blood, in general, no matter what species it comes from is blue when it is oxygen deficient (in our veins)... and red when it has oxygen (in our arteries)... if a snake is cut open (while alive.... or right after being killed) then all of the blood will be red, regardless if you hit a vein or artery..... because when the blood is given oxygen it turns red.\n\n-Z
38622
Blood is\nalways red: bright red when it is oxygenated on the arteriolar side of our\ncirculation, and deep red when it is not oxygenated on the venous side.
1139400
In the circulatory system, venous blood or peripheral blood is blood returning to the heart. With one exception (the pulmonary vein) this blood is deoxygenated and high in carbon dioxide, having released oxygen and absorbed CO2 in the tissues. It is also typically warmer than arterial blood, has a lower pH, has lower concentrations of glucose and other nutrients, and has higher concentrations of urea and other waste products.\n\nVenous blood can be obtained by venesection or phlebotomy, or in small quantities by fingerprick. Most medical laboratory tests are conducted on venous blood, with the exception of arterial blood gases.\n\nVenous blood is often depicted as blue in color in medical diagrams, and veins sometimes look blue when seen through the skin. However, venous blood is actually a dark red color, while arterial blood is bright red. The appearance of blood as dark blue is a wavelength phenomenon of light, having to do with the reflection of blue light away from the outside of venous tissue if the vein is @ 0.02in deep or more. This is due to the difference in color between deoxyhemoglobin and oxyhemoglobin; the red color ultimately originates from the iron atom in heme. If blood is drawn for a medical test, the dark red color can be seen; however, if it is exposed to oxygen in the air, it will turn bright red like arterial blood.\n\nArterial blood is taken from any easily accessible artery (typically either radial, brachial or femoral) or out of an arterial line. The syringe is prepacked and contains a small amount of heparin, to prevent coagulation or needs to be heparinised, by drawing up a small amount of heparin and squirting it out again.\n\nOnce the sample is obtained, care should be taken to eliminate visible gas bubbles, as these bubbles can dissolve into the sample and cause inaccurate results. The sealed syringe is taken to a blood gas machine. If the sample cannot be immediately analyzed it should be chilled in an ice bath to slow metabolic processes that may also cause inaccuracy. The machine aspirates this blood from the syringe and measures the pH and the partial pressures of oxygen and carbon dioxide and the bicarbonate concentration, as well as the oxygen saturation of hemoglobin. Some machines can also measure glucose, lactate, hemoglobin and limited electrolytes (sodium and potassium).\n\nThe results are usually available within five minutes, and are now ready for interpretation.
219455
because blood is blue.\n\nit only turns red when it oxidates/coagulates with oxygen.
172977
what color are your eyes?
501395
The colour of the blood underwater is moreover black. The reason behind it is- Red colour of blood is due to presence of oxygen. Thus heamoglobin at this moment is called oxy-haemoglobin. and its colour is red. When under water the amount of Oxygen is less and thus colour becomes more of blackish due to accumulation of CO2 and other gases along with hormones.
438306
The color is absorbed in the body and our bloodstream. Its yellow is the urea from our kidney. If you drink enough water it wont be as yellow.
60350
I have looked and seen.\nThe blood of most animals you are familiar with is red.\n\nYou are most familiar with oxygenated blood which is bright red. When you cut yourself the blood that leaks out is in contact with oxygen in the air and becomes oxygenated.\n\nDeoxygenated blood is a darker red.\nThe deoxygenated blood in veins is NOT visible just by looking at your skin. What you are seeing is the colour of deoxygenated blood viewed through the layers of tissue of the vein walls.\n\n'Blue blood' does not exist except for convenience in diagrams to distinguish it from the oxygenated blood in other parts of the diagram. The other common misconception is the use of 'blue blood' to describe aristocracy - cut of their heads and there is lots of bright red blood!\n\nHOWEVER - there ARE some animals (but none you are likely to have heard of) that do have blue blood - the oxygen is carried on copper rather than on iron.
169978
actually CRIP colors r just blue b cuz they beleive that the blood in our body is blue...... the BLOODS color is red b cuz they believe the blood in our body is red....but in all honesty its a proven fact that blood is blue inside our body but once we r cut and blood hits oxygen it turns red. look at ur wrists and everywhere ur veins are at - u can c the blue blood.
996370
BROWN  AND REALLY BLOOD SHOT RIGHT NOW\n\nAND WOW THERE ARE A LOT OF PEOPLE WITH BROWN EYES THAT ANSWERED THIS QUESTION
231773
From the colour of the blood? No.\n\nThe only way to determine your blood type is through serotyping. Antibodies are added to a blood sample, and blood type is determined by whether or not agglutination occurs.
118622
Red.\n\np.s. I took a look at your school's web site. It looks like a great school. :)
659347
RED RED RED RED RED THATS THE BEST COLOR!!! RED MEAN POWER, AND RESPECT!!!!