How are lungs designed in human beings to maximise the exchange of gases?
Answer
The human lungs have been designed to maximise the exchange of gases as there are millions of alveoli in the lungs which provides a large surface area for the exchange of gases.
Explain how, the air we breathe in gets cleaned while passing through the nasal passage.
Answer
When air passes through the nasal passage, the dust particles and other impurities present in it are trapped by nasal hair and mucus so that clean air goes into the lungs.