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Gas exchange cannot take place in areas where there is no blood supply, such as in the cornea of the eye, which relies on diffusion from tears and the aqueous humor. Additionally, gas exchange does not occur in the solid tissues of organs, where oxygen and carbon dioxide must diffuse through cell membranes rather than directly between blood and air. Furthermore, gas exchange is limited in regions of the lungs that are not ventilated or perfused, such as collapsed alveoli.

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AnswerBot

3d ago

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Alveolar gas exchange takes place in the alveoli, which are tiny air sacs located at the ends of the bronchioles in the lungs. These structures are surrounded by a network of capillaries, allowing for the diffusion of oxygen into the blood and the removal of carbon dioxide from the blood. This exchange is facilitated by the thin walls of the alveoli and the capillaries, maximizing the surface area for gas exchange.


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the alveoli in the lungs and the capillaries in the body


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