Everything about The Bronchiole totally explained
The
bronchioles are the first
airway branches that no longer contain
cartilage. They are branches of the
bronchi, and are smaller than one
millimeter in diameter.
There are no
glands or cartilage in any of the bronchioles, and the
epithelial cells become more
cuboidal in shape.
The bronchioles terminate by entering the circular sacs called
alveoli.
Control of airflow resistance and air distrubution in the lungs is controlled by the bronchioles.
Pathology
Bronchospasm, a life-threatening situation, occurs when the smooth muscular tissue of the bronchioles constricts, severely narrowing their diameter. Bronchospasm is commonly treated by
oxygen therapy and
bronchodilators.
The medical condition of inflammation of the bronchioles is termed
bronchiolitis. Diseases of the bronchioles include
asthma,
bronchiolitis obliterans,
respiratory syncytial virus infection, and
influenza.
Additional images
Image:Tertiary bronchus.JPG|Cross sectional cut of primary bronchiole
Image:Diagrama de los pulmones.svg|Bronchi, bronchial tree, and lungs
Image:illu_quiz_lung05.jpg |1. Trachea
2. Mainstem bronchus
3. Lobar bronchus
4. Segmental bronchus
5. Bronchiole
6. Alveolar duct
7. Alveolus
Further Information
Get more info on 'Bronchiole'.
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