The Respiratory System

Ciliated epithelium location:

(A) Kidneys - Incorrect: Renal tubules have microvilli but lack motile cilia.

(B) Intestines - Incorrect: Intestinal epithelium contains absorptive cells with microvilli, not cilia.

(C) Blood Vessels - Incorrect: Vascular endothelium is non-ciliated squamous epithelium.

(D) Bronchioles - Correct: The respiratory tract (especially bronchioles) contains pseudostratified ciliated columnar epithelium that moves mucus.

The correct answer is (D) Bronchioles, where cilia function in the mucociliary escalator mechanism.