why do arteries have red color?

Answer 1

It's primarily accepted convention. But, arterial blood is bright red and venous blood is a darker color, with a hint of bluish purple. And, your superficial veins appear bluish in color. So the convention has some rationale.

What's next: why are nerves yellow and lymphatics green?

Answer 2

They don't. If you cut open a live person and look at an artery, it's actually whitish. Arteries have thicker walls than veins, and you can't see the blood within them as well. They do look red when they're covered with blood during surgery, but so does everything else.

Arterial blood is redder than venous blood, but both are red in color. (Look at the blood in the vacuum tube - no oxygen there - next time you have blood drawn. It's dark red, not blue.)

In anatomic drawings, we use red to indicate arteries and blue to indicate veins, because arterial blood is redder, and we can see the difference in the drawings.

Answer 3

blood combines with oxygen to form oxyhemoglobin which is bright red in color and runs through arteries. When it gets to the capillaries, it gives up oxygen to the cells. at this point, it returns to the lungs through veins. Hemoglobin without oxygen has a blue tint, So veins appear slightly bluish.

Answer 4

they have a red color because they carry oxygenated blood away from the lungs and to the organs of the body. the veins appear to be a blueish color under the skin because the blood has not passed through the lungs to have oxygen attached to it yet! hope it helps

Answer 5

They carry oxygenated blood away from the heart and lungs to other parts of the body

Answer 6

that's the color of oxygenated blood.




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