Question

Which sinus opening is not present in the middle meatus?

• A. Maxillary sinus
• B. Frontal sinus
• C. Ethmoidal sinus
• D. Sphenoid sinus

Hint:

When studying sinus anatomy, remember the different meatuses and which sinuses drain into each.

Answer 1

The Correct Option is D

The sphenoid sinus does not open into the middle meatus. The sphenoid sinus opens into the superior meatus of the nasal cavity, while the maxillary, frontal, and anterior ethmoidal sinuses open into the middle meatus.