What are the Bronchiole and bronchi feature?

Bronchi and bronchioles are key components of the respiratory system. The bronchi are larger air passages that branch off from the trachea and lead into the lungs, featuring cartilage to maintain their structure. In contrast, bronchioles are smaller, tube-like branches that extend from the bronchi; they lack cartilage and have smooth muscle, allowing them to regulate airflow and resistance within the lungs. Together, they facilitate the distribution of air to the alveoli, where gas exchange occurs.