Why is the respiratory system of a bird more efficient than the human respiratory system?
A)The bird respiratory system does not mix exhaled air with inhaled air.
B)A bird lung contains multiple alveoli, which increases the amount of surface area available for gas exchange.
C)The human respiratory system ends in small parabronchi, which reduce the amount of surface area available for gas exchange.
D)Only B and C are correct.
E)A, B, and C are correct.

Question

Quizplus · Accepted Answer

Birds have a unique respiratory system where air flows in one direction through their lungs, preventing the mixing of inhaled and exhaled air, which allows for more efficient gas exchange.

Why Is the Respiratory System of a Bird More Efficient