Pulmonary gas exchange occurs in the:
A)conducting zone.
B)upper respiratory tract.
C)respiratory zone.
D)larynx.

Question

Quizplus · Accepted Answer

Pulmonary gas exchange, the exchange of oxygen and carbon dioxide between the lungs and blood, occurs in the respiratory zone which includes the alveolar ducts, alveolar sacs, and alveoli. The conducting zone (A) includes the trachea, bronchi, and bronchioles which simply conduct air to and from the respiratory zone. The upper respiratory tract (B) includes the nasal cavity, pharynx, and larynx which also only conduct air and help filter, warm, and humidify it. The larynx (D) is part of the upper respiratory tract and helps protect the lower respiratory system by preventing food and liquids from entering the trachea.

Pulmonary Gas Exchange Occurs in The