Hematology involves the blood and bone marrow diseases and the addition of vascular, immunostructural, hemostatic and vascular frameworks are determined, treated and prevented. Different kinds of blood illnesses could affect individuals. A quarter of the world"s population is suffering from anemia, and the main cause is a iron deficiency. Chronic fatigue, cognitive impairment, and decreased well-being are associated with anemia. Proper regulation increases life quality, decreases iron deficiency symptoms and reduce blood transfusion requirements. On the other hand, pernicious anemia is a type of anemia where by the number of blood cells is less than average. B12 in the body, the anemia cannot be pernicious enough to produce solid red blood cells. Your blood is not regularly divided and too expansive without sufficient vitamin b12. (lung & blood. Mechanisms are responsible for anemia caused by iron-restricted erythropoieis. With pure iron deficiency an imbalance between iron uptake and consumption can cause depleted iron storage.