Pulmonary acinus

Last revised by Dr Sonam Vadera on 19 Feb 2021

Pulmonary acinus is commonly defined as the portion of lung distal to a terminal bronchiole and supplied by a first-order respiratory bronchiole or bronchioles 1

Each secondary pulmonary lobule usually contains 3-12 acini, and adjacent acini are separated by incomplete intralobular septa.

See also

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Cases and figures

  • Secondary pulmonary lobule: diagram
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