The text highlights three essential components of healthcare services: patient registration, outpatient department (OPD), and pharmacy. Patient registration is the first step, where patient information is gathered for identification and record-keeping. The OPD offers medical consultations and treatments for patients who do not need to stay overnight in a hospital. Finally, the pharmacy dispenses medications prescribed by healthcare professionals, ensuring patients receive the correct treatments. Together, these components are crucial for effective patient care and maintaining continuity in local healthcare systems, with a focus on health promotion.