Nobody really knows why our blood is red.
That is a silly statement. Obviously since Swammerdam and van Leeuwenhoek we know that it is red, that red is the reflected spectrum of visible light on the surface structure of the red blood cell or erythrocyte. (Same reason, by the way, why our veins look blue…deoxygenated blood is dark red, oxygenated bright red, neither is ever blue.) Continue reading
blood studies 