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Respiratory bronchiole

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Title: Respiratory bronchiole  
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Subject: Terminal bronchiole
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Respiratory bronchiole

Respiratory bronchiole
Diagram of the alveoli with both cross-section and external view.
Schematic longitudinal section of a primary lobule of the lung (anatomical unit);
r. b respiratory bronchiole;
al. d alveolar duct; at atria;
a. s alveolar sac;
'a' alveolus or air cell;
p. a.: pulmonary artery;
p. v pulmonary vein;
l lymphatic;
l. n lymph node.
Latin bronchioli respiratorii
Gray's subject #240 1098

The respiratory bronchioles are the narrowest airways of the lungs, one fiftieth of an inch across.[1] The bronchi divide many times before evolving into the bronchioles. The bronchioles deliver air to the exchange surfaces of the lungs.[2] They are interrupted by alveoli which are thin walled evaginations. Alveolar ducts are distal continuations of the respiratory bronchioles.

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External links

  • Diagram at
  • eMedicine Dictionary
  • 13606loa

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