How are the lungs dained in
ng designed in human beings to maximise the area for exchange of gases
OR
Whar advantage over an aquatic organism does a terrestrial organise have with regard
to obtaining oxygen for respiration
Answers
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.
Each Lungs has highly branched respiratory tract called respiratory tree. A Primary Bronchus divided into secondary bronchi, secondary into segmental bronchi, segmental Bronchus into bronchioles which divided into terminal Bronchioles, respiratory bronchioles, alveolar sacs and alveoli. Alveoli are small rounded pouches which are extremely thin walled and possess a network of Caterpillar over their surface. They function as respiratory surface. The total area of all the alveoli is more than 80m². It is several times more than the surface of the whole human body. Thus, the human lungs are designed to maximize the area of exchange of gases.
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