the gases exchange in alveoli is type of
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Gas exchange is the delivery of oxygen from the lungs to the bloodstream, and the elimination of carbon dioxide from the bloodstream to the lungs. It occurs in the lungs between the alveoli and a network of tiny blood vessels called capillaries, which are located in the walls of the alveoli.
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the walls of alveoli actually share a membrane with the capillaries in which Oxygen and Carbon dioxide move freely between the respiratory system and the bloodstream. oxygen molecules attach to red blood cells, which travle back to the heart. At the same time, the carbon dioxide molecules in the alveoli are blown out of body with the next exhalation.
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