red blood cell - erythrocytes life cycle and circulation scheme in human body . biological anatomy diagram.

acids amino anatomy b12 bile bilirubin biliverdin biology blood body bone care cell circulation cycle days death diagram educational erythopoietin erythrocytes etythropoiesis excreted ferritin globin health heme human illustration intestine kidneys labeled life liver macrophage marrow medicine phagocytosis protein red scheme science spleen synthesis system transferrin transport urine vector vitamin