Histological Features of Bronchi

Steps:

• Identify bronchi as airways with cartilage rings, smooth muscle, and pseudostratified ciliated columnar epithelium.
• Evaluate statement 1: Bronchi are lined with epithelium for protection and mucociliary clearance.
• Evaluate statement 2: Goblet cells, which produce mucus, are absent in bronchi but present in upper airways like trachea.
• Evaluate statement 3: Smooth muscle tissue surrounds bronchi to regulate airflow.

Why B is correct:

• Bronchi possess epithelial lining and smooth muscle for structural support and contraction, as defined in respiratory histology.

Why the others are wrong:

• A: Includes incorrect statement 2 about goblet cells.
• C: Omits true statements 1 and 3.
• D: Omits true statement 1.

Final answer: B