Is your blood red or blue?
Human blood is definitely not blue. This is a common misconception that comes from looking at the 'blue' veins in the skin and anatomy charts. The color in blood comes from hemoglobin, a protein that carries oxygen. When there is lots of oxygen in the blood, the hemoglobin turns a little brighter red. When blood is in your veins (that are mostly red too), and is de-oxygenated and carrying wastes from the body tissues, it is a very, very dark red. It only seems blue when you look through your skin because the skin and blood reflect light differently and make the veins and venous blood seem blue looking through light colored skin. If you were to look inside someone, their veins and arteries and the blood inside them would look very similar, not blue at all. Blue is only a reflective property of the skin and underlying veins. Arteries would look just the same if they were close enough to the surface to see like veins.
Incorrect Answer No, instead they all have blue blood. This is because they have a certain molecule inside the blood containing copper. Most organisms have blue blood. Humans have blue blood! Answer Actually, Squids have red blood. Octopuses have blue blood. The answer above is incorrect. But it is true that humans have blue blood that turns red when it is exposed to oxygen.
In relation to the human body, it is a common misconception that blood is blue; all blood is red. The blue appearance is due to the connective tissues of the blood vessels. Blood cells can be either erythrocytes, which are red, or leukocytes, which are white. When blood is oxygenated it is a much brighter red than de-oxygenated blood.
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…