Cardiopulmonary resuscitation (CPR) is an emergency procedure that combines chest compressions and artificial ventilation to manually preserve brain function in a person experiencing cardiac arrest until further treatment can restore blood circulation and breathing. CPR is important because it keeps blood flow partially active, extending the time window for successful resuscitation by medical professionals. The order of performing CPR is remembered as C-A-B for compressions, airway, and breathing. Videos are provided to demonstrate administering CPR to adults, children, and babies. Quizzes are also available for users to test their understanding.