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%.

The respiratory zone represents the 16th through the 23rd division of the respiratory tract.

See also

Conducting zone

External links

Flash overview at mcgill.ca^{[dead link]}
Diagram at gdn.edu^{[dead link]}

Anatomy of the lower respiratory tract

Respiratory tree

Trachea	Tracheal rings Annular ligaments Carina
Bronchi	Main left right Secondary eparterial Tertiary

General	Landmarks Base Apex Root Hilum Fissures Horizontal Oblique Superior lobe Lingula of left lung Middle lobe of right lung Inferior lobe
BP segment	Bronchiole: Conducting zone (Terminal bronchiole) Respiratory zone (Respiratory bronchiole Alveolar duct Alveolus Blood-air barrier)
Cells	Alveolar cells Type I Type II Club cell Goblet cell

v t e Index of the respiratory system
Description	Anatomy nose larynx lower thorax Physiology Development
Disease	Congenital Neoplasms and cancer Chest trauma Infection common cold pneumonia tuberculosis Other Symptoms and signs
Treatment	Procedures mechanical ventilation Drugs nasal throat obstructive airway diseases cough and cold histaminergics pulmonary arterial hypertension other Surgery

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