Bronchioles

Bronchioles are small tubes in the lungs that branch off from the larger bronchi, which carry air from your windpipe. They help direct air deeper into the lungs, eventually reaching tiny air sacs called alveoli where oxygen is absorbed into the blood. Bronchioles are lined with smooth muscle, allowing them to constrict or relax to regulate airflow based on your body's needs. They play a crucial role in efficient breathing, ensuring that oxygen reaches all parts of the lungs for your body to use.