Bronchial Tissue Composition

Steps:

• Identify bronchus as a conducting airway in the respiratory system.
• Note cartilage provides structural rigidity to prevent collapse.
• Confirm ciliated epithelium lines the lumen for mucociliary clearance.
• Verify smooth muscle in walls regulates diameter and airflow.

Why A is correct:

• Bronchi contain hyaline cartilage rings for support, pseudostratified ciliated columnar epithelium for trapping particles, and smooth muscle for bronchoconstriction, as defined in respiratory anatomy.

Why the others are wrong:

• B: Smooth muscle is present to control airway resistance.
• C: Cartilage and ciliated epithelium are essential for bronchial structure and function.
• D: Cartilage is present to maintain patency.

Final answer: A