My Biology teacher said blood is still red when it's in our body. If that's true, why are our veins blue?
The blue is caused by the diffusion of the light through our skin and the walls of the veins. Blood is red, always.. well unless it gets outside the body and the cells die then it's brown :)
The cells which build the walls of our veins are blue. Blood isn't actually that vivid red, when u breathe in, oxygen converts the color a little and changes it to that dark blood color. hope i helped! :)
Blood in your veins is deoxygenated blood... it has a slight blue color to it... kinda purple. It becomes bright red when oxygenated. Arteries carry oxygenated blood.
I'm pretty sure it's because of our skin color.
Our vains are blue because in our body the blood Inside our body because it has not hit oxygen yet.
Blood in the veins has no oxygen.
It's the reflection. The skin makes the dark red blood look blue, but it is never blue.