Below our tongue, why do arteries and veins appear differently coloured?

Question

arteries appear orangish, veins appear bluish in color.

the walls of both the vessels are of similar composition.. though arteries have thicker walls..

is that the CO2 that makes the color of the blood so different in veins??

or is there any pigment which is responsible for this??

Answer 1

No PIGMENT is responsible for the phenomenon.

As you know , veins are superficial (present near the skin surface ) and arteries are deep -seated.

Veins appear blue because the subcutaneous fat in the skin absorbs lower-frequency light, permitting only the highly energetic blue wavelengths to penetrate through to the dark vein and reflect off.

This does not make the vessel blue, however. It only makes it look blue.

I don't think I agree with Jon. Deoxyhaemoglobin is NOT blue!!

The blood carried by veins is dark red due to its high percentage of CO2 as it returns to the heart (in contrast to the high levels of O2 in arterial blood, which is bright red).

Answer 2

theyre not protected by out skin like all the other ones soo its easier to see the color

Answer 3

oxyhemoglobin is red, while deoxyhemoglobin is blue

Answer 4

When and if those blood are exposed with oxygen, they turn red. Within your body, it remains that color that you see.

And I back up jon. Nothing more I can say.

Answer 5

he is right..