. . "Red blood (or \"oxygenated\" blood) is carried in the left side of the heart. Blood does not change its pigment or color based on oxygen content, therefore blood is always red."@en . . "Which side of the heart carries red blood"@en . "Red blood (or \"oxygenated\" blood) is carried in the left side of the heart. Blood does not change its pigment or color based on oxygen content, therefore blood is always red."@en .