1) First aid involves providing immediate care to sick or injured people until full medical treatment is available. It aims to preserve life, prevent worsening of conditions, and promote recovery.
2) The roles of a first aider include managing incidents, assessing casualties, arranging emergency help, providing appropriate first aid treatments, documenting details, and handing over care.
3) When providing first aid, it is important to control bleeding, treat for shock, check for fractures or spinal injuries, and seek medical help for serious conditions.