Which shows the correct pathway of air flow in the bird lung (only the order is

Question

Which shows the correct pathway of air flow in the bird lung (only the order is important): a. mesobronchus> dorsobronchus> parabronchus> ventrobronchus> anterior air sac b. mesobronchus> snterior air sac> dorsobronchus> parabronchus> ventrobronchus c. mesobronchus> posterior air sac> dorsobronchus> parabronchus> anterior air sac d. ventrobronchus> dorspbronchus> posterior air sacS> msesobronchus> parabronchus e. anterior air sac> posterior air sac> mesobronchus> parabronchus> ventrobronchus

Explanation / Answer

ANSWER:

The bird’s respiratory system consists of paired lungs, which contain static structures with surfaces for gas exchange, and connected air sacs, which expand and contract causing air to move through the static lungs. A breath of oxygen-rich inhaled air remains in the respiratory system for two complete inhalation and exhalation cycles before it is fully spent and exhaled out the body.

The correct pathway of air flow in the bird lung is

Mesobronchus>Anterior air sac>Dorsobronchus>Parabronchus>Ventrobronchus

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