woman holding breathing bag ambu bag.demonstrating cpr cardiopulmonary resuscitation training medical procedure on cpr doll in the

adult aid ambu ambulance assistance background bag breathing cardiopulmonary care chest class concept cpr demonstrate demonstrating device doctor doll dummy education emergency equipment female first for health heart help holding hospital injury instructor learn learning life mask medical medicine men model paramedic practice procedure rescue rescuer respirator respiratory resuscitation safety save teach teamwork training treatment women