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deoxygenated blood looks slightly purple/blue as the fe^2+ prosthetic groups in the erythrocytes (red blood cells) are not bound to O2. when they are, they appear the colour red that is seen when blood is exposed to the air.

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13y ago

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Why is it said royals have blue blood?

If you look at the wrist of an untanned caucasian person, the veins there look almost blue. Royalty were usually shaded when out in the sun, by servants and the like. Thus, royalty were believed to genuinely have blue blood.


What causes new babies to look blue when all their blood vessels look the same as their veins through their skin?

I think its blue baby syndrome, a side effect is skin going blue.


Why does blood look blue in the veins?

Blood appears blue in veins due to the way light interacts with the skin and the blood vessels. The blue color is not actually the color of the blood itself, but rather a result of how light is absorbed and reflected by the skin and the veins.


If your blue veins are showing in your wrists is that a sign your period is coming or is that a sign of pregnancy?

First, ALL blood vessels just under the skin look blue. Blood vessel color, or whether flatter or puffier, is NOT a pregnancy symptom. You might be confusing facts with a later pregnancy sign, when blood vessels in the breasts engorge (e.g. the vessels look bigger). Blood vessel color, size, or appearance anywhere that vessels are seen through the skin also has nothing to do with menstruation.


Why is blood red while veins appear blue?

Blood is red because of the iron in red blood cells, which gives it a red color when oxygenated. Veins appear blue because of the way light interacts with the skin and the blood vessels, causing them to look blue from the outside.


Why are veins blue?

Veins appear blue because of the way light interacts with the skin and the blood vessels underneath. The skin absorbs red light, making the veins look blue.


Why do veins look blue even though blood is red?

Veins appear blue because of the way light interacts with the skin and the blood vessels underneath. The skin absorbs red light, making the veins appear blue. Blood is actually red, but the way light is absorbed and reflected by the skin makes veins look blue.


Can tiny blood vessels in your feet dry up?

well if you want to know look at your blood vessels lol


Which blood vessel has blood color?

All vessels containing blood would have red blood; in arteries and in veins and smaller vessels.The blue appearance of veins is an optical illusion that comes from the way light works on skin. The veins look blue because they are closer to the surface, if arteries were not as deep, they would look blue, too. It has nothing to do with oxygenation of blood in arteries and all to do with the properties of light and skin.


How deep are the arteries in your wrist Am I seeing the veins or the arteries when I look at my wrist How deep would I have to cut to hit an artery?

The Related Links section has a link to a website that has a diagram of the arm.The bluish blood vessels visible when you look at your wrist are veins. The arteries are deeper and not located particularly near the veins. Gray's Anatomy has a transverse section of the wrist; if you look at it you'll see you'd have to cut fairly deeply to hit one of the arteries, and the other is buried behind a ligament.


Why do your veins look blue under your skin?

Veins appear blue under the skin because of the way light interacts with the skin and the blood inside the veins. The skin absorbs different colors of light, but blue light is able to penetrate deeper into the skin and reflect off the blood vessels, making them appear blue.


Why do your vains look blue?

your veins look blue because your blood has no oxygen, when your blood is oxygenated it is red and when it is deoxygenated it is blue. veins carry blood toward the heart and are often blue while arteries carry blood away from the heart and are filled with oxygenated blood.