ANATOMICAL TRAVELOGUE / SCIENCE PHOTO LIBRARY ANATOMICAL TRAVELOGUE / SCIENCE PHOTO LIBRARY
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Visualization of a healthy bronchiole surrounded by smooth muscle. Bronchioles are small branches of bronchi within the lungs. They act as air pathways for oxygen and carbon dioxide to pass through during the respiration process. At the end of every bronchiole is an alveolus, which is a small sac that allows for gas exchange within the circulatory system.
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