Bronchioles function and definition

Bronchioles are small, branching structures in the lungs that stem from the bronchi and lead to the alveoli, where gas exchange occurs. Their primary function is to conduct air to the alveoli while also playing a role in regulating airflow and protecting the lungs from pathogens and foreign particles. Bronchioles are lined with smooth muscle, allowing them to constrict or dilate, thus controlling the amount of air that reaches the alveoli. Additionally, they can produce mucus to trap inhaled particles, contributing to respiratory health.