Paranasal sinuses are lined by____ epithelium:: (A) Ciliated columnar, (B) Columnar, (C) Cuboidal, (D) Squamous
Answer is A. The paranasal sinuses are lined by the mucus membrane which is continuous with the mucosa of the nasal cavity through the ostia. It is a ciliated columnar epithelium having goblet cells which secrete mucus.