lall video of lungs and belly of small intestine diffuse oxygen and nutrients into blood respectively how these structures are designed for each exchange of gases and absorption of nutrients
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During gas exchange oxygen moves from the lungs to the bloodstream. At the same time carbon dioxide passes from the blood to the lungs. This happens 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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