Viral News: Do you know Why your veins appear blue when blood is red? The Fact will surprise you

Viral News: Our bodies are also nothing short of a mystery. You've probably seen many such things in your body that look typical, but their reasoning is rather different and startling. Have you ever paid attention to the veins on your hands? Red blood is continually flowing through these veins. When you are injured, cut, or scraped, red blood flows from these veins. So, why are these veins invariably blue or purple in colour? What does science have to say? This is what we discussed in the Strange Knowledge series today.

The color depends on the oxygen level

According to medical science, the color of blood is always red. However, the shade of red it is depends on the amount of oxygen in the blood. It is generally believed that  blood with more  oxygen is redder, while blood with less oxygen begins to turn blue. But that is not true. The oxygen in the blood is  actually  in the red blood cells. It is also hidden in the hemoglobin of red blood cells. Every time you breathe, the red blood cells are filled with oxygen and their color becomes dark red. But when that blood begins to flow to other parts of the body, the oxygen levels begin to decrease because body parts take oxygen from here. Carbon dioxide then begins to fill these cells. But even they do not change the color of the blood.

 The color of blood  is neither blue nor black

According to Dr. Kleber Fertrin, a professor at the University of Washington, the blood returns to the lungs after the oxygen has been carried to all the tissues of the body, therefore to all the organs. Even then, this blood remains red. This clearly means that the color of human blood is never blue or black and only the tone changes.  Veins that look blue are just an illusion.

The blue appearance of the veins is just an illusion because the veins are under a very thin layer of skin. What we see depends on the wavelength of the retina. Our skin has many layers that separate the wavelengths, causing retinal confusion. Blue and green wavelengths of light are always shorter than red. That is why our skin absorbs the red color and the blue or green rays hit our retina. That's why the veins look blue despite having red blood.

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