It is the study of the morphology and physiology of blood. the haematology lab test are concerned with diagnosis and monitoring of diseases of blood + blood forming organs. All blood cell are made in home narrow the centre of large bone. The cellular element of blood a number of proteins including haemoglobin clotting factors are investigated. Haematology tests are performed to diagnose diseaes such as Omenia, leukemia, infection, abnormalities of blood coagulation (eg. Haemopulia). The complete blood count (CBC) is a routine investigation and a valuable screening tool that give information on a patients blood cells. Depending on CBC results, a blood film (PBF) may be prepare stained for microscopic examination by the pathologist.