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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.
Lungs. Simple squamous epithelium lines the air sacs, or alveoli, of the lungs. The alveoli are sites where air is exchanged in the lungs. Simple squamous epithelial cells in the alveoli allow oxygen from the air to enter the blood in the capillaries of the lung.Carbon dioxide, a waste product, passes across the epithelium of the alveoli to be removed from the body.imple squamous epithelium refers to a single layer of thin, flat cells that line body surfaces. One side of the surface opens to the environment while the other is anchored to the underlying cells.