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 \| Bronchi \| Alveoli \| Conducting zone \| Respiratory zone