Pulmonology studies the respiratory system and the disorders that affect breathing, gas exchange, and lung function. It examines the airways, lungs, and related structures, investigating how they respond to environmental exposures, infections, allergies, inflammation, and chronic injury. The field encompasses conditions such as asthma, COPD, interstitial lung diseases, pulmonary fibrosis, pulmonary hypertension, sleep-related breathing disorders, and respiratory infections. By integrating physiology, imaging, molecular biology, and clinical practice, pulmonology advances diagnostics, therapeutics, and long-term management strategies for diseases that significantly impact global health and quality of life.