Pulmonary acinus

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 contains 3-12 acini, and adjacent acini are separated by incomplete intralobular septae.

See also

Thoracic anatomy
Share article

Article information

rID: 8766
System: Chest
Section: Anatomy
Synonyms or Alternate Spellings:
  • Pulmonary acini
  • Acini of the lung

Support Radiopaedia and see fewer ads

Cases and figures

  • Drag
    Pulmonary acinus
    Secondary pulmonary lobule: diagram
    Drag here to reorder.
  • Updating… Please wait.

    Alert accept

    Error Unable to process the form. Check for errors and try again.

    Alert accept Thank you for updating your details.