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Alveolar Gas Exchange
Description
This template shows a cross-section of an alveolus surrounded by a capillary, depicting gas exchange between inhaled air and blood. It labels type I and type II pneumocytes, an alveolar macrophage, a fibroblast, and red blood cells, showing oxygen entering and carbon dioxide leaving the bloodstream as it flows between the pulmonary artery and pulmonary vein.
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