The Exchange of Gases That Occurs During External Respiration Takes

Question

The exchange of gases that occurs during external respiration takes place in the
A)trachea
B)terminal bronchioles
C)alveoli
D)bronchi
E)all of the choices are correct

Accepted Answer

The exchange of gases that occurs during external respiration takes place in the alveoli, where oxygen from inhaled air diffuses into the bloodstream and carbon dioxide produced by cells diffuses out of the bloodstream into the alveoli to be exhaled. The trachea, bronchi, and terminal bronchioles are part of the respiratory system but do not participate in gas exchange.