Pathology is a branch of medical science primarily concerning the examination of organs, tissues, and bodily fluids in order to make a diagnosis of disease. The main branches of pathology are clinical pathology, anatomical pathology and general pathology. General pathology describes the scientific study of disease which can describes abnormality that is causing changes in the structure or function of body parts. Anatomical pathology involves the study and diagnosis of disease based on the examination of surgically removed bodily specimens or sometimes of the whole body (autopsy). Clinical pathology concerns the laboratory analysis of blood, urine and tissue samples to examine and diagnose disease.