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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.
Alveoli are small air sacs in the lungs, as small as a grain of sand.There are billions of these in the lungs, and the purpose of these alveoli are to supply de-oxygenated blood with a supply of oxygen through gas exchange.They are well-equipped to do this, as well.irst alveoli are coated with a substance known as surfactant to prevent them from collapsing. Second, there is a medium for immunoglobulins such â¦ as IgA to exist so that pathogens in the air can be defended against. Third, the air that enters the lungs is humidified to prevent drying and abrasion tissues.