Which effect occurs in avian respiratory systems when air sac walls become inflamed?

💡 Explanation

When air sac walls become inflamed (airsacculitis), edema and exudate impair gas exchange because this increases diffusion distances in the air capillaries of parabronchi within the lungs. Therefore reduced oxygen uptake results, rather than increased CO2 expulsion, vocalization or improved maneuverability, which rely on alternative respiratory functions.

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