Where Does External Respiration Occur?

External respiration is the exchange of gases with the external environment, and occurs in the alveoli of the lungs. Internal respiration is the exchange of gases with the internal environment, and occurs in the tissues. The actual exchange of gases occurs due to simple diffusion.

Where does external respiration occur quizlet?

External respiration occurs in the alveoli; the pH is higher and the temperature is lower; oxygen diffuses from the alveoli into the blood and carbon dioxide diffuses from the blood to the alveolar space for expiration.

How does external respiration occur?

External respiration, also known as breathing, involves both bringing air into the lungs (inhalation) and releasing air to the atmosphere (exhalation). During internal respiration, oxygen and carbon dioxide are exchanged between the cells and blood vessels.