Question

0 science how are the lungs designed in human beings to maximise the area for exchange of gases ?

Answer 1

in the inhalation of air the external intercostal muscle push upward and the diaphragm moves downward all these results into the increase in volume of thoracic cavity

Answer 2

♤ In the lungs, the air passage that divides into smaller and smaller tubes called bronchi which form bronchioles .

♤ The bronchioles terminate in the balloon like structure called alveoli.

♤ The alveoli present in the lungs provide maximum surface for exchange of gases.

♤ The alveoli have very thin walls and contain an extensive network of blood vessels to facilitate exchange of gases.