What is the role of alveoli?
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Alveoli are tiny sacs within our lungs that allow oxygen and carbon dioxide to move between the lungs and bloodstream.
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alveoli are tiny sacs
blood capillaries are wind around them the gases diffuse through the walls of the aleveolar sacs and through the capillary wall
blood capillaries are wind around them the gases diffuse through the walls of the aleveolar sacs and through the capillary wall
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