the airway tubes that lead from the trachea or windpipe to the alveolar sacs in the lungs Bronchi are the larger tubes; bronchioles are the smallest tubule branches
The lower end of the trachea divides into two bronchi (tubes) that carry air into the lungs One bronchus goes to the left lung, the other to the right lung
The airways that lead from the trachea to each lung, and then subdivide into smaller and smaller branches They connect to the bronchioles The walls of the bronchi are made of smooth lining tissue (called endothelium) over fibrous connective tissue, cartilage, and smooth muscle They also have many glands to produce mucus (singular: bronchus)
Tube-like passageways (airways) that allow the air we breathe to enter and exit the lungs Like a tree, each bronchus divides again and again, becoming narrower each time The narrowest "branch" , or "passageway", is called a bronchiole