Respiratory zone

The respiratory zone is the site of O₂ and CO₂ exchange with the blood.

The respiratory bronchioles and the alveolar ducts are responsible for 10% of the gas exchange. The alveoli are responsible for the other 90%.

Respiratory system	Edit
Nose - Nasal cavity - Pharynx - Larynx - Trachea - Lungs - Conducting zone - Respiratory zone

See also: Respiratory zone, Alveolar duct, Alveoli, Blood, Conducting zone, Larynx, Lung, Nasal cavity, Nose