The respiratory system includes the trachea (windpipe), two bronchi (one bronchus
branching into each lung), the lungs, and the bronchioles (smaller airways in
the lungs). The right lung has three lobes, and the left lung has two
Primary Medical Reviewer
E. Gregory Thompson, MD - Internal Medicine
Specialist Medical Reviewer
R. Steven Tharratt, MD, MPVM, FACP, FCCP - Pulmonology, Critical Care Medicine, Medical Toxicology
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