Not always it can be many colors but I don't know why.
When blood cells have oxygen they are red, when they have no oxygen they are a darker shade of red.
No deoxygenated blood is dark red and oxygenated blood is lightish red.
red and blue. the red blood is closer to the other side of your skin and the blue blood is deeper in your body.
? Are you asking what color does blue blood turn after it comes in contact with air? Red!
Some will say that the blood is blue in the veins because your veins are blue looking. This is incorrect. The blood is in fact red inside the veins, the veins just look blue due to the way the light passes through the fat and skin cells above.
When the blood is going to the heart it is blue. When it is going away from the heart, it is red.
blue,cheers and thanks
the of your blood after birth could be blue and red.
Blood is actually the color red, so blood is represented by the color red because it is red. It is sometimes represented by blue to represent deoxygenated blood, which is actually dark red as opposed to the bright red of oxgyenated blood. This is purely for visual purposes so those learning about the circulatory system can see clearly where there is oxygenated blood and where there is deoxygenated blood. The myth that human blood is blue is not true, but the blood of a horseshoe crab is actually the color blue.
Deoxygenated blood is typically a dark red or maroon color.
They use red and blue ink when tracing the flow of blood because red ink is for arteries and blue ink is for veins. This can cause a problem because people sometimes think that arteries have red blood and veins have blue blood, but this is not true.
The blood of birds and other animals is red.