The maxillary air sinus opens into middle meatus at______________?
Correct answer: D. Hiatus semilunaris
- A. Infundibulum
- B. Summit of infundibulum
- C. Bulla ethmoidalis
- D. Hiatus semilunaris
Explanation
The maxillary sinus drains into the middle meatus through the hiatus semilunaris, usually via the ethmoidal infundibulum. The bulla ethmoidalis is an adjacent ethmoidal structure, not the opening of the maxillary sinus.
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