Ciliated Epithelium in Respiratory Airways

Steps:

• Identify ciliated epithelium's role: traps and moves mucus to clear airways.
• Locate it in conducting zone: trachea lines with pseudostratified ciliated columnar epithelium.
• Extend to bronchi: retains cilia for mucus transport.
• Stop at bronchioles: terminal bronchioles have cilia, but alveoli lack them for gas exchange.

Why C is correct:

• Ciliated epithelium lines trachea, bronchi, and bronchioles per respiratory anatomy, aiding mucociliary clearance up to respiratory zone transition.

Why the others are wrong:

• A: Excludes bronchi and bronchioles, which also have cilia for mucus escalation.
• B: Omits bronchioles, where cilia persist in smaller airways.
• D: Includes alveoli, which have simple squamous epithelium without cilia.

Final answer: C