Which of the following is true about paranasal sinuses?
A) Paranasal sinuses enhance the resonance of the voice and lighten the skull.
B) Paranasal sinuses contain passages acting as one- way valves.
C) Paranasal sinuses are found in maxillary, ethmoid, and lacrimal bones.
D) Paranasal sinuses open into the oral cavity.

Question

Quizplus · Accepted Answer

Paranasal sinuses enhance the resonance of the voice and lighten the skull. They are air-filled spaces in the bones around the nasal cavity, specifically in the maxillary, frontal, ethmoid, and sphenoid bones, not the lacrimal bones. They open into the nasal cavity, not the oral cavity.

Which of the Following Is True About Paranasal Sinuses