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Overview of the Respiratory System

Author(s): Center for Educational Outreach, Baylor College of Medicine

Inside the Lungs

The lining of bronchioles contain cilia and mucous which trap contaminants and move them toward the esophagus, where they are swallowed.

Alveoli are surrounded by an extensive capillary network. All gas exchange between the air and blood occurs across the walls of the alveoli.