Question

how are the lungs how are the lungs designed in human beings to maximize the area for exchange of gases​

Answer 1

Lungs play a major role in the respiratory system. In humans, a pair of lungs are designed in such a way that they are lined by a thin membrane, the smaller tubes called bronchioles a balloon-like structure called alveoli and network of blood capillaries increase the surface area for exchange of gases.
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Answer 2

Answer:

Lungs contains small sac like millions of structure and highly vascular called alveoli...

alveolar walls are one cell thick providing gases with a short diffusion distance. Moist walls - gases dissolve in the moisture helping them to pass across the gas exchange surface.

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