Erythropoiesis, erythropoietin, and iron.
D000740:Anemia / Q000097:blood / Q000175:diagnosis; D000747:Anemia, Hypochromic / Q000097:blood; D001772:Blood Cell Count; D001854:Bone Marrow Cells; D004909:Erythrocyte Indices; D004920:Erythropoiesis; D004921:Erythropoietin / Q000494:pharmacology*; D006412:Hematopoietic Stem Cells / Q000166:cytology; D006454:Hemoglobins / Q000032:analysis / Q000096:biosynthesis; D006801:Humans; D007501:Iron / Q000097:blood*; D010100:Oxygen / Q000097:blood; D012156:Reticulocytes
D006454:Hemoglobins; D004921:Erythropoietin; D007501:Iron; D010100:Oxygen