True or false. Inside your body your blood is blue, but when esposed to oxygen it turns red.?

Answer 1

It turns out that the presence or relative absence of oxygen is what determines the 'color' of blood. What gas (oxygen or carbon dioxide) associates with hemoglobin is based almost solely on how much of each is available. In the lungs, there
is alot of oxygen available and so it associates with hemoglobin in the blood. The blood then travels in arteries out to your tissues(muscle, skin etc). Oxygen delivered to tissues is rapidly used by the cells to perform all the chemical reactions that keep them healthy and the by-product is carbon dioxide. So when the blood gets to the tissues there is very little oxygen and plenty of carbon dioxide, which means that the oxygen leaves hemoglobin for the tissues and carbon dioxide leaves the tissues for the hemoglobin in the blood. The blood then travels in veins back to the lungs
where we start all over.


Finally, to your question. It turns out that hemoglobin has a red color to it and that oxygenated hemoglobin is bright red. So in arteries blood appears to be bright red. This is true inside and outside. Outside of the body the color actually fades a bit (becomes darker), because there is less pressure to keep oxygen associated with the hemoglobin. But if you cut an
artery the blood squirting out will appear bright red. Blood that is in veins, however, has very little oxygen associated with it and this yields a color that is much darker with a blue tint, but really the blood inside (and if you cut a vein) is just a deep shade of red. You can also see this in persons that have stopped breathing or have blood flow blocked to a specific area; they appear blue.

Answer 2

Who knows, i always thought it was red and the veins gave it a bluish color.

Color
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 3

False. Your blood is varying shades of red, depending upon the level of oxygenation it has. (Higher oxygen level, brighter red color...) There is always some degree of oxygen in the blood, whether it is going from your heart or back to it. The body only uses a certain percentage of that oxygen, and it recirculates the blood to replenish its levels. You may be thinking of the situation where blood that is venous appears darker in color than arterial blood. That's a reflection of the oxygen situation just described.

Answer 4

True and False. It's both. Blood carrying oxygen is red. Blood carrying CO2 is blue

Answer 5

False.

"Blood is never actually blue, although it appears to be blue when we look at veins through skin. Blood is always red: bright red when it is oxygenated on the arteriolar side of our circulation, and deep red when it is not oxygenated on the venous side."

Answer 6

FALSE.
Red blood cells, or corpuscles, encased in blood vessels, color the blood. Since there are about 35 trillion of these tiny, round, flat discs circulating in one's body at any one time, their sheer number necessarily lends their red color to the blood.
As the young red blood cell matures, and takes on an adult form in the marrow of the bone, it loses it's nucleus, and it increases its production of hemoglobin. Hemoglobin is the red pigment, or color of blood, and contains iron, combined with protein.

Answer 7

The red blood has been oxygenated...
The blue blood is lacking oxygen.

Answer 8

The blood going to your lungs is blue,the blood comming from your lungs is red.

Answer 9

false. they only color it blue and red in text books to differentiate the oxidized from the unoxidized. Its not actually blue.

Answer 10

No. I heard that, but it is completely false! It's always red