When hemoglobin is not bound to oxygen it appears blue?

What color is deoxyhemoglobin?

Deoxyhemoglobin is a dark red or maroon color. It appears this way because it lacks oxygen, which gives it a more bluish or purplish hue when bound to hemoglobin.

What color does hemoglobin impart?

Bright red

Why blood red in colour?

The hemoglobin in the blood goes red when it absorbs oxygen. Blood is not always red, if it is lacking in oxygen, it is infact blue. If you look at the veins in your arm or hand, they do not have much blood and therefore will be blue. You will never see blue blood because if you cut yourself, the blood is exposed to the air, allowing it to be oxygenated and thus turning it red.

Is blood in your veins blue until it comes out of your body and hits oxygen?

No, blood is never blue. Blood appears blue in veins due to how light is absorbed and reflected, not because of its color. Once it comes in contact with oxygen, it appears red because of the presence of hemoglobin.

Why is human blood red?

Because of the presence of hemoglobin in our blood.Human blood is red only when it is oxygenated, meaning oxygen molecules have bound to hemoglobin in the red blood cells after the blood passed through lung tissues. Blood where no oxygen is bound to the hemoglobin will be blue in color.Inside the body, blood leaving the lungs is bright red because it is freshly oxygenated. Blood returning from various parts of the body to the lungs will be blue because it is is devoid of oxygen.Blood from a cut or wound is always red because oxygen in the air binds with the hemoglobin.

Why blood looks red when you see it?

== == Blood looks red because the hemoglobin absorbs blue-yellow light when bound with oxygen. The reflected light is then red.

I have a cut that's bleeding dark red blood is that heathy?

The color of blood is a function (normally) of the amount of oxygen bound to hemoglobin. Less oxygen means the blood will be closer to blue than red.

Does hemoglobin have proteins?

Hemoglobin is an iron-containing protein. Hemoglobin contains a hemo prosthetic group that has an iron atom at its center. When the iron is bound to oxygen, the hemo group is red in color (oxyhemogoblin), and when it lacks oxygen (deoxygenated form) it is blue-red.

Is bloood brighter with oxygen or no oxygen?

Blood is brighter red when it is oxygenated, as oxygen binds to hemoglobin in red blood cells to form oxyhemoglobin, giving blood its bright red color. Deoxygenated blood appears darker red due to the presence of reduced hemoglobin.

Why are squids blood blue?

To understand why octopus blood is blue, we need to first understand why our blood is red. The blood of most vertebrates (animals containing a backbone..ie: Humans, dogs, birds, reptiles, etc...) is red because our blood contains a protein called hemoglobin. Hemoglobin is the molecule responsible for carrying oxygen. Hemoglobin is located in red blood cells. When red blood cells enter the lungs, hemoglobin binds oxygen molecules, and as the red blood cells flow throughout our bodies, hemoglobin releases the oxygen to our cells, nourishing them. The way that this is done is through the use of Iron. Iron (specifically Iron III) is an ideal molecule for binding oxygen. When iron binds oxygen it turns RED. This is why our blood is red; because the hemoglobin within our red blood cells contains iron, which turns red when bound to oxygen. When hemoglobin is not bound to oxygen, our blood is blue as well. Go ahead, look at one of your veins. Veins carry oxygen-depleted blood back to the lungs and heart. Until this blood contacts more oxygen, it remains blue. Now to answer the question: why is octopus blood blue? In short, Octopus blood lacks hemoglobin, and hence lacks iron. Oxygen transfer is accomplished by another (less efficient) protein known as hemocyanin. This protein, as well as other molecules in the octopus' blood give it the characteristic blue color.

What determine whether blood is bright red or dull brick red?

The color comes from hemoglobin and the hemoglobin changes color depending upon what is bound to it. Oxyhemoglobin (hemoglobin with oxygen bound to it), deoxyhemoglobin (hemoglobin with no oxygen bound to it) is somewhat bluish. Arterial blood, which has been to the lungs and is on its way to the tissues, is usually fairly saturated with oxygen (anywhere from 95-100% of the hemoglobin is bound to oxygen), and so it looks bright red. Blood in the veins, coming back from the tissues, is less saturated (perhaps 60-80%), and so it appears darker. If there is enough unbound hemoglobin in the blood, it may actually take on a bluish hue, and that is why someone may appear blue if they are not getting oxygen. Carbon monoxide also binds to hemoglobin and results in an even brighter red color than when oxygen binds. Someone with carbon monoxide poisoning may have even brighter red blood and may have a bright red coloration to the lips and fingernails. It is also possible for the iron in hemoglobin to be changed from the ferrous (2+) to ferric (3+) state and the result is methemoglobin, which is a more brownish compound. There is normally a very small amount of methemoglobin circulating in the blood and this can be increased by exposure to certain chemicals (in particular, certain nitrogen compounds). Interestingly, methemoglobin is capable of binding cyanide, so the "antidote" for cyanide poisoning is a nitrogen compound that converts hemoglobin to methemoglobin, which then binds up free cyanide in the blood. Under normal circumstances, the blood contains primarily oxyhemoglobin and deoxyhemoglobin.

What is actual color of blood?

Blood is actually red due to the presence of hemoglobin, a protein that contains iron and binds with oxygen. When blood is oxygen-rich, it appears bright red, while oxygen-poor blood appears darker red. The misconception that blood is blue comes from the color of veins, which can appear blue under the skin due to how light interacts with it.