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Q. 4. How are the lungs designed in human beings to maximise the area for exchange of gases?
Answers (1)
The air passages in our lungs dived into several smaller passages called bronchi.
These bronchi further divide into even smaller passages called bronchiloes which terminate into very small baloon like structures called Alveoli. Each lung consists some million alveolis as they are very small in size.
These alveoli have very soft lining optimum for absorption of Oxygen through vessels and their large number provide a very large surface area for the absorption of oxygen.
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