The kidney and erythropoiesis.
D000740:Anemia / Q000209:etiology; D001803:Blood Transfusion; D001806:Blood Urea Nitrogen; D002859:Chromium Isotopes; D004905:Erythrocyte Aging; D004920:Erythropoiesis / Q000502:physiology*; D004921:Erythropoietin / Q000032:analysis / Q000096:biosynthesis; D006400:Hematocrit; D006801:Humans; D007501:Iron / Q000378:metabolism; D007503:Iron Isotopes; D007668:Kidney / Q000502:physiology*; D007674:Kidney Diseases / Q000150:complications; D011086:Polycythemia / Q000209:etiology; D014511:Uremia / Q000097:blood / Q000378:metabolism
D002859:Chromium Isotopes; D007503:Iron Isotopes; D004921:Erythropoietin; D007501:Iron