Which statement below is accurate regarding the maxillary sinus?

Show Answers

The maxillary sinus opens to the outside via the middle meatus and nasal vestibule.The maxillary sinus has a shape resembling a four-sided pyramid.Typically, the primary opening (ostium) is located in the posterior third of the hiatus semilunaris.All of the above statements are correct.

Explanation

Option A is correct because the maxillary sinus drains into the nasal cavity through the middle meatus and nasal vestibule. Option B is true as the maxillary sinus is shaped like a four-sided pyramid. Option C is accurate since the main ostium is usually found in the posterior third of the hiatus semilunaris. Therefore, option D, which includes all these facts, is the correct choice.