A "male nurse" performs the identical job of a nurse, with responsibilities including patient care, administering medications, monitoring vital signs, assisting with medical procedures, and educating patients and families. The job title is simply "nurse," with "male nurse" or "murse" being informal descriptors, not formal distinctions. A nurse's specific duties vary based on their specialization (e.g., clinical, critical care, pediatric) and work environment (hospital, clinic, home healthcare).