When Schmidt-Nielsen and his colleagues followed a "pulse" of air through the respiratory system of an ostrich, it took two full cycles of inhalation and exhalation for this pulse to pass through and be exhaled.

Question

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Schmidt-Nielsen and his colleagues discovered that in an ostrich, a "pulse" of air takes two full cycles of inhalation and exhalation to pass through the respiratory system and be exhaled, demonstrating the efficiency and complexity of the avian respiratory system.

When Schmidt-Nielsen and His Colleagues Followed a "Pulse" of Air