In which ways are the lungs adapted for efficient gas exchange?

There are three main ways in which the lungs are adapted for efficient gas exchange. These are: the fact that structures in the lungs called alveoli provide a large surface area for gas exchange. Also, the lungs have an excellent blood supply due to a large capillary network, which means a diffusion gradient is always maintained. Finally, the alveoli and capillary walls are only one cell thick meaning there is only a small distance for gases to diffuse.

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