Question

How lungs are designed in human being to maximise the area for exchange of gases

Answer 1

Lungs are designed in such a way that they are lined by a thin membrane to facilitate the exchange of gases. ... In the lungs the bronchioles terminate in balloon like structure called alveoli.the alveoli contains network of blood cappilaries that increase the surface area for exchange of gases.

Answer 2

Lungs has many balloon like structures...
Which are termed as bronchioles...
Surface area of bronchioles is about 80sq
And thus lungs are designed to maximise the area for exchange of gases...