Which outcome results when avian air sac volume lags behind lung ventilation rate during flight?

💡 Explanation

When air sac oxygen supply cannot keep pace with ventilation, inadequate oxygen unloading at gas capillaries, impaired oxygen diffusion through capillaries, or higher venous CO2 concentrations occur because the respiratory system lags, leading to restricted diffusion. Therefore, muscle oxygenation is compromised, rather than muscle temperature, tracheal integrity, or buoyancy affected, whose impairment originates, by alternative biological mechanism, at dissimilar body system.

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