Red blood cells don't have nucleus. Red blood cells lose their nucleus to make space for oxygen. It also contains Hemoglobin. Hemoglobin is a respiratory pigment. respiratory pigments is a molecule that helps increase the oxygen carrying capacity. Hemoglobin and oxygen mixed together gives blood its red colour.
Red blood cells carry oxygen around our bodies, specifically our organs and tissues.
Red blood cells carry oxygen around our bodies, specifically our organs and tissues.