Illustration of the respiratory tract shows the nasal cavity (sinuses), epiglottis, upper respiratory tract, lower respiratory tract, bronchi, nasopharynx, oropharynx, larynx and trachea.

Figure 7.1Lung defenses

Source: Cook 2000. Reprinted with permission from Elsevier Health, © 2000.

From: 7, Pulmonary Diseases

Cover of How Tobacco Smoke Causes Disease: The Biology and Behavioral Basis for Smoking-Attributable Disease
How Tobacco Smoke Causes Disease: The Biology and Behavioral Basis for Smoking-Attributable Disease: A Report of the Surgeon General.
Centers for Disease Control and Prevention (US); National Center for Chronic Disease Prevention and Health Promotion (US); Office on Smoking and Health (US).

NCBI Bookshelf. A service of the National Library of Medicine, National Institutes of Health.