The document discusses the components of the EMS system including bystanders, dispatchers, first responders, EMTs, emergency departments, specialty centers, and allied health personnel. It describes the roles and responsibilities of EMT-Bs which include patient safety, assessment, documentation, and continuing education. Quality improvement ensures the highest quality of care through reviews, audits, feedback, and continuing education. Medical direction provides clinical oversight with on-line direction using phones/radios, off-line using protocols, and standing orders varying by state law.