List at least four healthcare professionals with important roles in the healthcare system.

Doctor: The doctor investigates the nature and causes of human disease, seeking its cure and prevention. Human health is the object of study of the physician. It researches, prevents and treats disorders and disorders. For this, it is essential that he is always well informed and updated about new drugs, techniques and technologies. Nurse: The nurse is dedicated to promoting, maintaining and restoring people's health, working in partnership with other professionals - doctors, nutritionists and psychologists, for example. This professional is indispensable in hospitals, works in clinics and provides home care. Collects data on the patient's health status and defines the conduct to be followed by the nursing staff. Physiotherapist: The physiotherapist treats and prevents illness and injury by employing techniques such as exercise and massage therapy (massage). This professional diagnoses and treats problems caused by genetic alterations, acquired diseases, accidents or posture addictions. It applies therapies designed to restore, develop and maintain the physical and functional capacity of the patient. It also does treatments based on water, heat, cold and specific appliances. Speech Therapist: The speech therapist is the healthcare professional who works with the different aspects of human communication (oral and written language, speech, voice, hearing) and the functions responsible for swallowing, breathing and chewing. Develops activities aimed at health promotion, prevention, counseling, evaluation, diagnosis and therapy, and works in teaching, research and consulting. It can compose teams with other professionals, such as physical therapists and psychologists.