Pathology medical science that studies the nature of the disease, their origins, manifestations. General pathology is the study of General regularities of pathological processes, branches of it are pathological physiology (see) and pathological anatomy (see). The term "pathology" refers to pathological changes in various organs and systems pathology liver, nervous, endocrine systems, and so on), General disorders of vital activity of an organism (pathology exchange, age-related pathology), changes caused special and extraordinary impacts on the body (radiation pathology) and large groups (pathology of social, professional).