What are the branches of the trachea that lead into the lungs called?

The branches of the trachea that lead into the lungs are called bronchi. When the trachea reaches the level of the lungs, it splits into two main bronchi—one for each lung. These bronchi further divide into smaller branches, known as bronchioles, which then lead to the alveoli where gas exchange occurs. The primary function of the bronchi is to transport air from the trachea into the lungs, playing a critical role in the respiratory system.

Other options refer to different structures: bronchioles are smaller branches off the bronchi, alveoli are tiny air sacs for gas exchange, and the medulla oblongata is part of the brain that regulates breathing but does not directly refer to the pathways for air movement in the respiratory system.