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.

External links

Trachea	Tracheal rings Annular ligaments of trachea Carina

Bronchus	main bronchus right left lobar/secondary bronchi eparterial bronchus segmental/tertiary bronchi

General	Left lung/Right lung Base/Apex Root/Hilum Superior lobe Lingula of left lung/Middle lobe of right lung Inferior lobe borders: Anterior border Cardiac notch Posterior border Inferior border surfaces: Costal surface Mediastinal surface Cardiac impression Diaphragmatic surface fissures: Oblique fissure Horizontal fissure

BP segment	Bronchiole: Conducting zone (Terminal bronchiole) Respiratory zone (Respiratory bronchiole Alveolar duct Alveolus Blood-air barrier)

Cells	Pneumocyte (Type I pneumocyte Type II pneumocyte) Clara cell Goblet cell

anat (n, x, l, c)/phys/devp

noco (c, p)/cong/tumr, sysi/epon, injr

proc, drug (R1/2/3/5/6/7)

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