The "mucociliary escalator" uses rhythmic ciliary motion to push mucus and trapped particles upward toward the pharynx for clearance.
Involuntarily controlled muscle that regulates airflow by contracting (bronchoconstriction) or relaxing (bronchodilation).
The (plural: bronchi ) is a critical, large airway tube that branches from the trachea (windpipe) to deliver air into the lungs. These tubes are part of the conducting zone of the respiratory system, serving as the main distribution network for oxygen while filtering and moisturizing inhaled air. Anatomy and Structure bronchus
Lined with ciliated pseudostratified columnar epithelium and goblet cells that produce mucus to trap dust and pathogens. Physiological Functions
These supply each lobe of the lung (three on the right, two on the left). The "mucociliary escalator" uses rhythmic ciliary motion to
Further divisions that supply specific bronchopulmonary segments. Histological Layers:
Acts as a passageway for air moving from the trachea to the smaller bronchioles and eventually the alveoli for gas exchange. These tubes are part of the conducting zone
The first branch into the right and left lungs. The right main bronchus is shorter, wider, and more vertical than the left main bronchus , making it a more common site for aspirated foreign objects.