Which of the following is an adaptation of the avian lung that best helps meet the metabolic demands of flight?
A) Airflow through the avian lung is bidirectional like in mammals.
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.

Question

Quizplus · Accepted Answer

Gas exchange during both inhalation and exhalation allows birds to have a continuous and efficient supply of oxygen, which is crucial for meeting the high metabolic demands of flight.

Which of the Following Is an Adaptation of the Avian