Bronchiole: Respiratory airways within the lungs that is smaller and farther away from the throat. These are the smallest air tubes within the lung and branch off of larger bronchi and join to alveolar ducts, and to alveolar acini.


   •   •   •

Bronchioles: The small airways branching off the Tertiary Bronchi. Terminal bronchioles lead into several orders of respiratory bronchioles which in turn lead into alveolar ducts and then into Pulmonary Alveoli.2


Types may include:3

Types of Bronchiole:

  • Left Lung Bronchiole
  • Respiratory Bronchiole
  • Right Lung Bronchiole
  • Terminal Bronchiole

   •   •   •


  1. Source: RDCRN (NCATS/NIH): cms/ rld/ Learn-More/ Glossary
  2. Source: MeSH (U.S. National Library of Medicine)
  3. Source: NCI Thesaurus

   •   •   •

Note: This site is for informational purposes only and is not medical advice. See your doctor or other qualified medical professional for all your medical needs.