About Red Blood Cells
February 24, 2010 – 9:21 amRed blood cells contain hemoglobin, which serves to carry oxygen from the lungs throughout the body. Red blood cells are red because the color of hemoglobin that contains iron. Lack of hemoglobin can cause reduced oxygen supply throughout the body, the symptoms are the body tired and less energy. To measure the amount of oxygen in hemoglobin we used a device called oximeter.