Bronchi

Definition

Bronchi are the main passageways into the lungs, branching off from the trachea. They play a crucial role in the respiratory system by allowing air to enter and exit the lungs.

5 Must Know Facts For Your Next Test

1. The bronchi are divided into two main branches called the left bronchus and right bronchus.
2. Each bronchus further divides into smaller tubes called bronchioles within the lungs.
3. The bronchi are lined with ciliated epithelial cells that help trap and expel foreign particles.
4. Bronchial walls have smooth muscles that can contract or relax to regulate airflow.
5. Conditions such as bronchitis involve inflammation of the bronchi, leading to breathing difficulties.

Review Questions

• What are the primary functions of the bronchi in the respiratory system?
• How do the left and right bronchi differ anatomically and functionally?
• What role do ciliated epithelial cells play in maintaining healthy bronchi?

Related terms

Trachea:

The tube connecting the larynx to the bronchi, providing a clear airway for breathing.

Bronchioles:

Smaller air passages within the lungs that branch off from the bronchi.

Alveoli:

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