the mechanism of human body which facilitates the exchange of r respiratory gases
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The structure of the human lung provides an immense internal surface that facilitates gas exchange between the alveoli and the blood in the pulmonary capillaries. ... Respiratory gases move between the environment and the respiring tissues by two principal mechanisms, convection and diffusion.
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Gas exchange takes place in the millions of alveoli in the lungs and the capillaries that envelop them. As shown below, inhaled oxygen moves from the alveoli to the blood in the capillaries, and carbon dioxide moves from the blood in the capillaries to the air in the alveoli.
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