Answer:
The most common term referred to in first aid is ABC. This stands for airway, breathing, and circulation. A fourth step will appear in the emergency procedures for some facilities.
-Airway: Make sure the airway is clear. Choking, which results from the obstruction of airways, can be fatal.
-Breathing: Once the airways are confirmed to be clear, determine whether the person can breathe, and, if necessary, provide rescue breathing.
-Circulation: If the person involved in the emergency situation is not breathing, the first aider should go straight for chest compressions and rescue breathing. The chest compressions will promote circulation. This saves valuable time. In emergencies that are not life-threatening, the first aider needs to check the pulse.
-Deadly bleeding or defibrillation: Some organizations consider dressing severe wounds or applying defibrillation to the heart a separate fourth stage, while others include this as part of the circulation step
