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 (http://en.wikipedia.org/w/wiki.phtml?title=MediaWiki:Respiratory_system&action=edit)
Nose - Nasal cavity - Pharynx - Larynx - Trachea - Lungs - Conducting zone - Respiratory zone

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