Bronchioles

Definition

Bronchioles are the small airways in the lungs that branch off from the bronchi and lead to the alveoli. They play a crucial role in controlling airflow and distributing air to different parts of the lung.

5 Must Know Facts For Your Next Test

1. Bronchioles are devoid of cartilage, allowing them to be more flexible than larger airways.
2. They are lined with smooth muscle, which can contract or relax to alter airflow resistance.
3. Proper nutrition can influence bronchiole function by maintaining the health of smooth muscle and epithelial cells.
4. Inflammation or damage to bronchioles can impede breathing and oxygen exchange, often seen in conditions like asthma or chronic bronchitis.
5. Certain nutrients such as omega-3 fatty acids, vitamins C and E, and antioxidants can help reduce inflammation in the bronchioles.

Review Questions

• What structural feature distinguishes bronchioles from larger airways?
• How does nutrition impact the health and function of bronchioles?
• Which nutrients are beneficial for reducing inflammation in bronchioles?

Related terms

Alveoli:

Tiny air sacs at the end of bronchioles where gas exchange occurs.

Bronchitis:

Inflammation of the bronchial tubes leading to increased mucus production and impaired airflow.

Asthma:

A chronic condition characterized by episodes of airway constriction due to inflammation and hyperresponsiveness of the airways.