Blue
Colorless. No color. But when they are exposed to oxygen, it develops a blueish color. i say,Lobster blood is weird because it has no color............................................
No. Blood is bright red when it contains oxygen and dark red when there isn't a lot of oxygen. The blue you see in veins is the vein itself.
Oxygen has hit the bood. Although the true color of blood is blue, when blood is exposed to oxygen it turns red.
blood is originally blue but when its exposed to oxygen it turns red
Carbon Monoxide
If you mean why isn't a cockroaches blood red, it is because they do not use hemoglobin to carry the oxygen in their blood. Hemoglobin is what causes blood to be red.
yes veins are red because they have oxygen in them and when blood is exposed to oxygen it turns red.
Spiders have circulatory systems just as humans do. However, their blood is colorless blood and is called hemolymph. It transports nutrients, hormones, oxygen and cells.
RBC's can be bright red when they are exposed to Oxygen.
Blue. Your blood is always blue until it is exposed to oxygen, when it reacts and turns red. Since veins aren't exposed to air/oxygen, they remain blue :)
Blue. Blood is only red when it is exposed to oxygen
Mammals have blue blood (lack of oxygen), but when exposed to oxygen, it turns red Hope this helped! :)