Try it now. Bronchioles Also found in: Dictionary, Thesaurus, Encyclopedia. Related to Bronchioles: Respiratory bronchioles, alveoli, Nasal passage bronchiole (brŏng′kē-ōl) plural.bronchioles [L. bronchiolus, air passage] One of the smaller subdivisions of the bronchial tubes.

The smallest airways, called bronchioles, lead to tiny air sacs called alveoli. Pneumonitis occurs when an irritating substance causes the tiny air sacs (alveoli) in your lungs to become inflamed. This inflammation makes it difficult for oxygen to pass through the alveoli into the bloodstream.

Definition What Is Respiratory System Diagram Features Parts Respiratory Tract Functions Respiratory System Definition “Human Respiratory System is a network of organs and tissues that helps us breathe. The primary function of this system is to introduce oxygen into the body and expel carbon dioxide from the body.” What is the Respiratory System?

Respiratory bronchioles and alveoli (tracheal bifurcation ->-> terminal bronchiole): - cartilage (decreases during branching) - mucous membrane - smooth muscle (increases during branching) (respiratory bronchiole ->-> alveoli) - epithelium (simple cuboidal ->-> simple squamous) Alveolar histology