The nurse is usually responsible, along with other health care professionals, for the treatment, safety and recovery of acutely or chronically ill or injured people. A nurse also cares for the health maintenance of the healthy patient and treatment of life-threatening emergencies in a wide range of healthcare settings. Nurses may also be involved in medical and nursing research and perform a wide range of non-clinical functions necessary to the delivery of health care. Nurses are also instrumental in providing care during the birthing process and death. A physician is a non surgical doctor who provides a first line of defense for their patients They must diagnose symptoms which sometimes turn out to have minor causes without concerning the patient Effective communication is key to the occupation and empathy with understanding of patients needs from all backgrounds is crucial