Circulation: The pulse of red is the arterial blood (oxygenated) leading from the heart and lungs to all of the tissues of the body. The pulse of blue represents the circulation back to the heart and lungs.
(Visible Spectrum of Oxygen)
Circulation: The pulse of red is the arterial blood (oxygenated) leading from the heart and lungs to all of the tissues of the body. The pulse of blue represents the circulation back to the heart and lungs.