Getting Started Emphysema Quiz COPD Quizchevron_right Emphysema Quizchevron_right Calculating Your Health Cost of Smoking Calculator There isn't much good that can be said about smoking. Now, on a positive note, do you know how much money you can save if you quit smoking today? What is COPD? See All  Anatomy of the Respiratory System in What is COPD? A detailed look at the respiratory system and how it works....more  Chronic Bronchitis in What is COPD? Chronic bronchitis is long-term inflammation of the breathing tubes (bronchi).