Is are blood...........?

Question

Isnt are blood blue right?

Answer 1

In your textbook, yes. In real life, no.

The blood contains Red Blood Cell and like its name says, its RED blood cell. The pigment hemoglobin gives it the RED colour. NOT the oxygen that it combines that gives it the RED colour. The combination of oxygen and hemoglobin just makes the colour brighter. Else, it is just slightly darker RED.

Answer 2

In humans and other hemoglobin-using creatures, oxygenated blood is bright red. This is due to oxygenated iron in the red blood cells. 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 venous blood is blue before it is exposed to air. Another reason for this misconception is that medical charts always show venous blood as blue in order to distinguish it from arterial blood which is depicted as red on the same chart.

Answer 3

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. Arterial blood comes out in spurts. It spurts every time the heart beats. I hope you never see that.

Your *blood* does not ever *look* blue. The blue things you see under your skin are veins. Veins are really whitish in color but because the blood is dark and the skin difuses the light, the veins *look* blue. The dark red blood *may* pick up a little oxygen and brighten up a slight bit, but your blood is *never* blue.

Actually the veins and arteries look similar when you remove the skin and can see them directly. Veins are a slightly more "bluish" white and the walls are thinner than arteries. Arteries, since they are a *high pressure* system pulsate (this is what you feel when you check your pulse).

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Blood is always red - bright red when it is oxygenated and a darker red when it's lacking oxygen. Deoxygenated blood just **looks** blue because you're seeing it through your skin....

HOWEVER, oxygen poor blood is most definitely NOT blue. It is a sort of purplish/maroon color at best. I workrd in the clinical labs, and have seen countless tubes of blood drawn from oxygen poor veins into vacuum tubes (i.e. never exposed to air), and it has never looked like the color of your veins!

Realize that to see the vein at all, light has to go THROUGH the skin and hit the blood in the vein. The blood absorbs certain colors of light, and reflects others back through the skin. ... For some reason, the combination of these effects (absorption by oxygen poor blood and absorption/deflection in the skin) gives a blue color.

The color of blood comes from the red blood cells (RBC's, also called erythrocytes), which make up about 40% of blood, by volume. Each red blood cell is filled with hemoglobin, the protein which carries oxygen to tissues and carbon dioxide away from tissues. Hemoglobin carries oxygen by using heme, a large ring-like molecule which has at its center a single atom of iron, which is what actually binds to the oxygen.

The nature of heme that gives it these abilities is in the many double covalent bonds that form the ring. These double bonds can be shifted into many different configurations...

When oxygen binds to the iron atom in heme, the iron changes its shape slightly, which alters the resonance of the heme molecule. This new resonance gives off a different frequency of light, so the perceived color of the heme goes from dark red to bright red. When the oxygen is released into the tissues, the iron goes back to its original shape, and the heme returns to its normal resonance, so the color goes back from scarlet to maroon.

Hope this is helpful...

Answer 4

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Answer 5

In the animals who use haemoglobin as their respiratory pigment blood is dark red. Haemoglobin contains an iron containing porphyrin pigment haem coplexed with a protein globin. It is red in colour on oxygenation but turns colourless on deoxygenation.
The animals which use haemocyanin as their respiratory pigment blood is blue. Because its metal component is copper. It is blue in colour on oxygenation but turns colourless on deoxygenation. It occurs in the blood of snails, squids, limulus, crustaceans.
Other respiratory pigments are haemoerythrin and chlorocruorin.

Answer 6

Yes, our blood is naturally blue. It turns red only when we breathe and the capillaries of the aveoli of our lungs absorb oxygen and is also absorbed by our blood cells, turning the blood cellls red.

Answer 7

No blood is red.. Red blood cells are the most abounded in the blood. Red blood cells contain hemoglobin and hemoglobin contains iron... That iron within the hemoglobin gives red blood cells red appearance.

Answer 8

yes our blood is blue without oxygen but when it hits oxygen it turns red.

Answer 9

our blood color is red when it is expose to air. but if it doesn't expose to air it will have a dark violet color, but never blue.

Answer 10

without oxygen, yes.