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Conclusion Questions 3.3.1 1. The walls of the alveoli in the lungs are incredibly thin. Explain how this structure is related to function in the body. The walls of the alveoli are extremely thin so that they can serve their purpose of allowing diffusion of oxygen and carbon dioxide to happen. This is where gas exchange occurs.
The structure of the alveoli is that there are blood vessels wrapping around them. Then, oxygenin from the alveoli can enter the blood. The blood will give oxygen to all the body's tissues, and later, in the alveoli, carbon dioxide or CO2 can leave the blood and be exhaled.