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Is Blood Red Inside The Human Body?

Is blood inside a human body blue??

  • me and my friend have an argument i say the blood is red and he says the blood is blue wich one of us is correct?

  • Answer:

    Blood in veins is dark red. Blood in arteries is bright red. Heme (in hemoglobin) is a red pigment.

igor f at Yahoo! Answers Visit the source

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Blood lacking in oxygen is a darker red, and oxygenated blood is bright red. It is never blue. (The reason it looks blue in your vessels through your skin is due to the color of the vessels, not the blood inside them.)

dana

NO Blood is always red

Weatherman

no its red

bell

red

J K

Blood is always red. Here's a way to think about it: oxygen runs through our veins. Thus, the myth about blood being blue and becoming red when it hits oxygen doesn't make the least bit of sense, as blood is ALWAYS exposed to oxygen.

madseason20

Contrary to popular belief, the colour of blood inside the body, no matter how you look at it is red. Blood is bright red when oxygenated and dark red when it lacks oxygen. When you look at blood through your skin it may look blue, but that is the result of how colour wavelengths travel through and are reflected by the skin. To see a vein at all, light must pass through the skin and hit the blood in the vein. The blood then absorbs certain colours of light and reflects others back through the skin. In blood, longer, redder wavelengths can go more deeply into the skin than shorter, bluer wavelengths before being reflected. Therefore, a blood vessel below the skin looks blue because the blue light is reflected. In reality, blood is either dark or bright red, depending on the amount of oxygen. When blood passes through your lungs, oxygen surrounds the haemoglobin turning your blood bright red. Also when blood is exposed as in the air, like when you cut your finger, it turns bright red. However, as blood moves through your body to nourish tissues, which reduces the amount of oxygen in the blood, it turns a darker shade of red

Meli

yeah that is true it is blue but when it comes out and meets oxygen it turns red :)

dlee_red

Im pretty sure that theres some of both, red when it has oxygen, blue when it dosnt

Lydia

Your both correct. Blood is blue when there no oxygen and blood is red when there is oxygen. So before the blood enter the lungs to get oxygen, it is blue. After the blood exits the lungs(after it gets oxygen) it is red. Hope this helps

Steven B

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