Normal versus asthmatic bronchiole
During an asthma attack, smooth muscles located in the bronchioles of the lung contract, narrowing the airways and decreasing the flow of air. Inflammation and excess mucus secretion can further decrease the amount of air flow.
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Review Date:
7/3/2011 Reviewed By: Harvey Simon, MD, Editor-in-Chief, Associate Professor of Medicine, Harvard Medical School; Physician, Massachusetts General Hospital. |
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