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How are air sac designed to maximise the exchange of gases |
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Answer» Air sac are generally called alveoli . Alvioli are richly provided with blood capillaries . The walls of these air sac are moistened which help in easy exchange of gases . As the blood circulates throughout the body and bring CO2 from the different body parts in alveoli CO2 diffuses in alveoli and it is exhaled . After exhaling it O2 is inhaled which enters capillaries by process of diffusion. In this way alveoli provide a much larger surface area for exchange of gases . Alveoli is ballon like structure which are connected by many blood cappillaries and when we inhale oxygen the size alveoli increase and diffuse to blood cappillaries . After it diffuse co2 gas which exhale out. Note that alveoli have much larger surface area in body. with the help of alvieoli |
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