Is blood...?

Question

OK, in science class today, the class got into a huge debate about if blood was blue or red. I kept insisting that blood was red, along with some others, and others said that blood was blue until it came into contact with oxygen.

Someone tried to disprove the blue theory, as if blood was blue until in contact with oxygen, and as long as we all breathe and live, oxygen will always be carried through our blood, and it would always be red.

Now, I asked a friend who said that in the blue veins, blood carried no oxygen. But I'm not sure. So, to start up the debate again, I want to see if anyone can manage to change my mind or back me up.

Answer 1

Well, red corpuscles still have red tinge because of the iron they contain, so even if you are hypoxic, if they took a sample your blood would still be red. But it would look a bit more purpley-red, and closer to blue on the spectrum. In the veins, the body carries oxygen-poor blood back to the heart to be sent to the lungs to get more O2: they appear blue under our skin, but are really red.
A person who is cyanotic, or lacking in oxygen, has a bluish tinge to his skin: when my son was born, he was so bright blue the doc collapsed his lung trying to suction him. But when they pricked his heel for a blood sample a second later his blood was red.
You are right. While oxygen makes the blood look redder, it is red because of hemoglobin, which contains the iron molecules and makes it look red.

Answer 2

Because of the red blood cells in your blood, your blood look red. Iron oxide is what makes blood cells red. Obviously, red blood cells carry oxygen. Blood is always red because of that. However, oxygen deprived blood will turn a duller color and looks blue or purple. No mater what, though, blood will always carry oxyen, only the "blue" blood will have a lot less oxygen.

Answer 3

IT IS RED! You are correct. It appears blue in the veins because you are seeing it through layers of muscle and skin tissue. In the blood stream, it is a dull red and becomes bright red when exposed to air due to hemoglobin, agents in red blood cells that bond with oxygen. It is always red. I wish these myths would disappear.

Answer 4

its all about degrees-when the blood returns by the lungs it can have some oxygen still in it making it degrees of purple to blue-usually still some on the purple side-slow pulse rates takes out more of the oxygen as well as heavier people the blood has to go more miles to circulate-when a person dies the oxygen runs out and even the lips showing blood turns blue-in Jesus amazing grace

Answer 5

Blood is red, not blue. Think of what you see when you have a blood test with blood drawn from the inside of your elbow. The blood does not contact oxygen as it fills the syringe or vial, but the blood is clearly red.

Answer 6

blood is guaranteed red in colour
because of the red pigment haemoglobin

it is true that in certain books the arteies are illustrated in red and veins in blue
this is because to differentiate between them
otherwise normal flowing blood is red this is higher organisms

in lower organism they have a fluild which has same function of blood(haemocoel) it is white in colour

Answer 7

your question is incorrect .. yes your question

blood is actually a light golden colour, similar to very watery honey

it is the red blood cells which give it the apparent red colour

the bluish tinge, is the appearance of 'cyanasis' which is

the red cells being "overcharged" with carbon dioxide

even though the cells are overloaded with carbon dioxide they still carry oxigen since carbon dioxide is one atom of Carbon and two atoms of oxygen .. but the oxygen is 'locked to the carbon by its double bonds (CO2)

Answer 8

Look at the veins close to the surface of your skin - like in your wrist. What color are they?

Answer 9

the blood is red no matter what !!!!!!!!!!!