How are the lungs designed in human beings to maximize the area for exchange of gases?

(N/A) The exchange of gases takes place between the blood of the capillaries that surround the alveoli and the gases present in the alveoli.
Thus,alveoli are the site for the exchange of gases.
The lungs get filled with air during the process of inhalation as the ribs are lifted up and the diaphragm is flattened.
The air that rushes inside the lungs fills the numerous alveoli present in the lungs.
Each lung contains $300-350$ million alveoli.
These numerous alveoli significantly increase the surface area for gaseous exchange,making the process of respiration more efficient.