Some people think that, but it is really a chemical in the atmosphere that turns it blue.
Carboxyhaemoglobin (carbon dioxide rich blood) is a red-purple colour.Oxyhaemoglobin (Oxygen rich blood ) is deep redCarbonmonoxyhaemoglobin (Blood containing carbon monoxide) is bright redAside: Some people think some blood is blue because veins (containing CO2 rich blood) appear blue. This is due to the colour of the veins and the colur absorption of the tissues. Octopi and horseshoe crabs do have blue blood because they use copper, not iron, to transport oxygen.
Some people think that it can.
Khaki. (some people think it's Navy Blue but it's not)
some muscles are red and others are blue of your blood
in the wizarding world some people judge you if your muggle-born, half-blood or pure-blood that's part of the reason why people think harrys cool hes pure-blood
Blood becomes blue when it is deprived of oxygen. These veins are returning de-oxygenated blood to the heart, making them appear blue.
Some animals (like horseshoe crabs) have blue blood because they use hemocyanin carry oxygen to their tissues instead hemoglobin like we do. The copper in the hemocyanin makes their blood appear blue.
arteries are blue because they carry blood away (a for away) from the heart, so the blood is highly oxygenated. When the blood goes around the body is becomes redder in colour as it is losing its oxygen to various muscels via capillaries. So no, the blood in arteries is not blue because it carries waste, it is blue because of the high oxygen levels in it. Blood can carry some waste though which gets taken i think to the kidneys.
once it comes into contact with oxygen it turns red.
yes, even though some people such as ignorant mothers think it does not it does bleed.
i really do not know i think some people do i have only seen about 20