Describe the mechanism of breathing in human beings. how lungs are designed on human beings to maximize the area for exchange of gases
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Respiration in human beings takes place through a special system called as respiratory system.This involves nostrils, nasal cavity, larynx, bronchi, bronchioles ending in alveoli inside thelungs. Lungs are designed in such a way that they are lined by a thin membrane to facilitate the exchange of gases.
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♤ 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.
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