Medicine is concerned with the maintaining or restoring human health through its study, diagnosis, and treatment. The term is derived from the Latin ars medicina which means the art of healing. The modern practice of medicine occurs at the many interfaces between the art of healing and various sciences. Medicine is directly connected to the health sciences and biomedicine. Broadly speaking, the term 'Medicine' today refers to the fields of clinical medicine, medical research and surgery, thereby covering the challenges of disease and injury.