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The protein hemoglobin, which carries oxygen in the blood, changes shape when it binds oxygen. When it changes shape, it absorbs different wavelengths of light, making it change color. When blood is exposed to air, much more of the hemoglobin absorbs oxygen than had in the vein the blood came from (in the veins, the hemoglobin has already given up most of its oxygen to the body). Therefore, the blood turns red.
Source(s):http://www.newton.dep.anl.gov/askasci/bi…
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What starts off blue when touched by air turns red?
Blood in the body is blue, when exposed to air it turns red.AnswerBlood may be thought of as a possible answer; however, blood is not actually blue. See related answer below.
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.
What colour would litmus turn in acids?
blue litmus paper turns to red when its in contact with acid
What is the result if mixing red plus violet?
When you mix red and violet it turns into a dark dark red like a blood color.
What metal element dissolved in nitric acid solution turns blood red with a Potassium thiocyanate test?
Iron (III) combines with the thiocyanate ion (SCN-) to make Iron Thiocyanate, which is a blood red compound. The two solutions most commonly used to make Iron Thiocyanate are Iron (III) Chloride (clearish yellowish brownish solution) and Potassium Thiocyanate (clear solution).
Why dous blood tern red?
Your blood turns red when it hits the air.
Is your blood truly yellow but red blood overtakes the color and is an illusion that your blood is red but not?
your blood is purple but turns red when it meets with oxygen
Is there black blood inside the body and when it hits the oxygenthen it turns red?
its blue/dark red blood before it turns fire engine red by oxygen not black.
Why colloidal gold turns to red?
Colloidal gold turns to red due to the red blood cells of the gold particles.
How is blood red?
Blood is actually a bluish,purplish color. Whenever you see blood, it is red because once the blood touches the air, it turns red.
What is the color of a normal blood?
Blood can only be red! Bright red blood is usually of arterial origin and is oxygenated. Dark red blood is usually venous. They are both healthy. Be more specific. One thing for sure: there are no "blue blood people"
What happens to blood when it passes the lungs?
It turns red
Why is it when you get blood work your blood is red?
Oxygen has hit the bood. Although the true color of blood is blue, when blood is exposed to oxygen it turns red.
Why do you see red?
That's easy. When blood is in your body it is blue that's why your veins are blue. When oxygen meets the blood the blood turns red.
What is the name of the substance that is found in red blood cells and turns bright red when it carries oxygen?
Red blood cells contain hemoglobin.
What is the meaning of blood?
blood is red blood cells that help your body flush out the bad stuff. blood is blue when its inside you and when it mixes with oxegn it turns red.
Why a blood have 2 colors?
blood is originally blue but when its exposed to oxygen it turns red
