Haemopoiesis. The red cell. Basic aspects of anaemia. Iron metabolism and hypochromic anaemia. Aplastic anaemia and bone marrow failure. Haemolytic anaemia. Quantitative disorders of leucocytes. Acute lymphoblastic leukaemia. Acute myeloid leukaemia. Chronic lymphocytic leukaemia. Chronic granulocytic leukaemia. Myeloproliferative diseases. Paraproteinemias. Malignant lymphomas. Haemostasis and abnormal bleeding. Platelet disorders. Coagulation disorders. Thrombosis. Treatment of thrombotic disorders. Bone marrow transplantation.