oxygenated blood is brighter red while the return path of blood that lacks oxygen is a dark crimson color.
Has something to do with the oxygen binding to the iron in the blood cells. or vice versa…
they assume through mental trickery that people will be so shocked to see the obvious.
The reason Blood is bright red has to do with the iron and the oxygen binding to the iron. there about.
I can see where someone tried in vain to disappear that guys arm with Photoshop