This document provides an overview of respiratory disorders in children. It discusses the anatomy and stages of lung development. It then covers various infectious and non-infectious disorders that can affect the upper and lower respiratory tract in children, including their symptoms, causes, diagnosis and treatment. Specific conditions discussed include croup, bronchiolitis, pneumonia, tuberculosis, foreign body aspiration, cystic fibrosis and congenital lung anomalies. Diagnostic tools like chest x-rays are also referenced.