What color is blood with no oxygen?

Answer 1

Blood is *never* blue. Blood is described as dark red (venous) or bright red (arterial). Our veins look blue because we are looking at them *through* our skin. The blood inside them is dark red and it doesn't reflect light very well. The blood you see when you get hurt is usually venous blood. oxygen-poor blood is blue, oxygen enriched blood is red.

In humans and other hemoglobin-using creatures, oxygenated blood is a bright red in its color. Deoxygenated blood is a darker shade of red, which can be seen during blood donation and when venous blood samples are taken. However, due to an optical effect caused by the way in which light penetrates through the skin, veins typically appear blue in color. This has led to a common misconception that before venous blood is exposed to air it is blue.

Answer 2

Deoxygenated Blood Color

Answer 3

Whole blood is not blue.It is either bright red ,with oxygen, moving away from the lungs.or dark red ,without oxygen as in the veins, moving back towards the lungs.

How ever, one scenario is that a person who takes a large hit or multiple hits of nitrous is getting little to no oxygen, which is reflected in the bluing of the blood flowing through the lips.Such bluing is called cyanosis.Mild cynosis is difficult to detect and is more obvious in the mucous membranes and nail beds. There needs to be more than 5 grams of deoxygenated haemoglobin in a persons bloodstream to see cyanosis. Usually the oxygen saturation of the blood has to drop below90% before this occurs.

Answer 4

Oxygenated blood is a bright, rich cherry-red; deoxygenated blood is a very, very dark red. The color is derived from the iron (heme) carrying hemoglobin molecules of red blood cells.

However, deoxygenated blood tends to absorb slightly more in the red end of the spectrum than oxygenated blood, and when combined with how long vs. short wavelengths are scattered when penetrating tissue, ends up making veins (carrying deoxygenated blood) appear blue when viewed through the skin.

Edit: yes, not only did I read the question, I also answered it. It's not complicated. Blood that is not carrying oxygen is very, very dark red, whether it is in space or not.

Answer 5

Don't mean to steal everyone's thunder, but use common sense science to help provide evidence. Do an experiment.Take a pc.of skin (chicken, pig, or something - your own if you want!), put it over red blood. Shine a light on it. What color does it appear to be?
So maybe it is green, white, whatever, maybe even blue, but it is understandable why some without science trained minds would think it is blue.

Answer 6

What Color Is Deoxygenated Blood

Answer 7

It isn't blue, it is a dark red. Oxygen rich blood is bright red but oxygen poor blood is darker red.

Answer 8

Deoxygenated blood tends to absorb slightly more in the red end of the spectrum than oxygenated blood, and when combined with how long vs. short wavelengths are scattered when penetrating tissue, ends up making veins (carrying deoxygenated blood) appear blue when viewed through the skin.

Answer 9

Blue

Answer 10

A lovely blue