Multiple Choice
How has the avian lung adapted to the metabolic demands of flight?
A) Airflow through the avian lung is bidirectional.
B) There is more dead space within the avian lung so that oxygen can be stored for future use.
C) Countercurrent circulation is present in the avian lung.
D) Gas exchange occurs during both inhalation and exhalation.
Correct Answer:
Verified
Correct Answer:
Verified
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