Bronchiole

passageways by which air passes through the nose or mouth to the alveoli of the lungs

The bronchioles or bronchioli are a part of the lung. They are the first airway branches that no longer have cartilage. They are branches of the bronchi. The bronchioles end by entering the circular sacs called alveoli.

Bronchiole
Diagram of the alveoli with both cross-section and external view.
Details
SystemRespiratory system
Identifiers
MeSHD055745
TAA06.5.02.026
THH3.05.02.0.00005
FMA7410
Anatomical terminology