A condition in which a person's airways become inflamed, narrow, swell and produce extra mucus, which makes it difficult to breathe is known as
| 1. | Asthma |
| 2. | Emphysema |
| 3. | Chronic bronchitis |
| 4. | Chronic obstructive pulmonary disease |
| I. | Asthma | inflammation of bronchi and bronchioles |
| II. | Emphysema | alveolar walls are damaged due to which respiratory surface is decreased |
| III. | Occupational Respiratory Disorders | fibrosis [proliferation of fibrous tissues] |
| 1. | Emphysema | 2. | Asthma |
| 3. | Tuberculosis | 4. | Common cold |
| I: | are caused by long exposure to dust at work place. |
| II: | can give rise to inflammation leading to fibrosis (proliferation of fibrous tissues) and thus causing serious lung damage. |