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This lesson covers the structure and function of the human gas exchange system as required by the Edexcel A-Level Biology specification (9BI0). You need to understand the gross anatomy of the lungs, the structure of the alveoli, the mechanism of ventilation, and how gas exchange occurs at the alveolar surface. You should also be able to describe the Edexcel required practical investigating the effect of exercise on breathing rate.
The human gas exchange system consists of the following structures, arranged in the order through which air passes:
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