can people have blue blood

Answer 1

No, human blood is red - the shade may differ at the various stages of the circulatory system, but ultimately you do not have blue blood.

The misconception comes from the color you see when you look at your veins. The light is refracted differently when it passes through your skin causing a bluish color. In addition, deoxygenated blood will look dark red, but never blue. Blood in veins is deoxygenated because it is flowing from tissues where oxygen was dropped off, and will then flow to the heart and lungs where it will become oxygenated and bright red.

Often times in Biology and other science textbooks, the path of oxygenated and deoxygenated blood in the circulatory system is illustrated by blue and red blood. This is solely to show clearly where blood is on its way to tissues to drop off oxygen and where blood is making its way back to the heart for the pulmonary circuit. Do not be confused and assume that deoxygenated blood is blue; it is that way in textbooks for visual illustration purposes.
No. Blood is red in colour. Veins close to the skin may look bluish.

Answer 2

It has to be a mixture between really dark purple and blue. The reason it looks red when you cut yourself with a paper cut (etc.) is because the air rushes to it. The air makes it rich and red.

Answer 3

no . the blood in octopus is blue

Answer 4

Yes, but it doesn't mean you're actual blood is blue. It simply means, if you say someone has "blue blood" it means they are a member of the Royal Family.

Answer 5

No sir.