2. 1. Emphysema

3. Emphysema

4. Alveoli become damaged making respiratory surface smaller Causes shortness of breath Smoking greatly increases risk

5. 2. Lung Cancer

6. Tumors form in lungs as a result of uncontrolled cell growth Smoking is the leading cause

7. 3. Bronchitis Inflammation of bronchi and bronchial tubes These branches to alveoli swell and clog with mucous Severe coughing and very difficult to breathe 2 Types: Short term, usually after the flu or a cold Long term, very common in smokers Acute Chronic

8. 4. Asthma

9. Allergic reaction that causes wheezing, coughing and breathing difficulties Bronchioles constrict squeezing air passages animation: asthma