Surgery involves broad knowledge and clinical procedural skills and encompasses many surgical specialisations. It involves anatomy, physiology, pathophysiology, investigation, differential diagnosis, infection control, and surgical and non-surgical management of health conditions. Surgical specialties include Cardio-thoracic surgery, General Surgery, Neurosurgery, Orthopaedic surgery, Otolaryngology, Oral and maxillofacial surgery, Paediatric surgery, Plastic surgery, Urology, and Vascular surgery. These specialisations relate to different organs and body systems, the type of patient or disorder, or the type of medical procedure involved. All surgical specialties look at managing patients with trauma and emergency conditions, with sepsis and/or who are critically ill, as well as providing specialist services for patients with congenital or acquired disorders, or elective surgical conditions. All surgical fields involve a wide range of specific techniques and competencies and an awareness of the benefits and limitations of each procedure. Surgery services involve multidisciplinary teams, recovery, follow up, therapies and rehabilitation, and palliative care. Services are provided in hospitals, in acute, secondary and tertiary care settings, and in private clinics.