The document provides an overview of the key components of emergency medical services (EMS) systems. It discusses the different levels of EMS personnel including EMRs, EMTs, AEMTs, and paramedics. The 14 components that make up an EMS system are also outlined, including public access, clinical care, medical direction, and prevention. The roles and responsibilities of EMTs are described, which include providing emergency medical care, ensuring safety, and upholding medical standards. Quality control within the EMS system is the responsibility of the medical director.