Hematological disorders involve problems with red blood cells, white blood cells, platelets, and the bone marrow. Common hematological disorders include anemia, bleeding disorders like hemophilia, blood clots, and blood cancers. Hemoglobin is composed of heme and globin proteins and carries oxygen in red blood cells. Disorders of hemoglobin can be qualitative from abnormal hemoglobin proteins or quantitative from reduced hemoglobin production. Examples of qualitative disorders include sickle cell disease and thalassemia, which involves impaired globin chain production. Hemophilia is a bleeding disorder caused by deficiencies in clotting factors VIII or IX. Untreated hemochromatosis results in iron accumulation that can damage organs like the liver