The Respiratory zone reference article from the English Wikipedia on 24-Jul-2004
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Respiratory zone

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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