Mixture of plasma and blood cells, the blood makes it possible to diffuse oxygen to each part of the body and to eliminate the poisons and waste. It also transports nutrients to all the tissues in the body and thus plays a role in digestion. But that doesn’t tell us why he has such a color? Why does blood wear such a pretty red dress? Answers.
Hemoglobin is responsible for blood color
If we think, wrongly, that the blood is red because it contains red blood cells, it is not.
“”It is hemoglobin that makes blood red … the iron it contains red on contact with oxygen“Note Dr. Kierzek.
Interesting fact: blood has different shades of red, depending on its oxygenation. The blood that comes from the heart is bright red while the old blood, impoverished in oxygen and charged with impurities, is rather dark.
On the other hand, if the veins may seem blue, they contain red blood well. It is the skin, acting as a “filter”, which gives – in appearance – a blue color with circulating blood.