Which structure opens into the inferior meatus of the nasal cavity?

Which structure opens into the inferior meatus of the nasal cavity?

• A. Nasolacrimal duct
• B. Inferior nasal meatus
• C. Sphenopalatine foramen
• D. Hard palate

Answer: (A)

Tears are drained from the eye through the nasolacrimal apparatus and end in the nasal cavity via a specific opening. The nasolacrimal duct carries tears from the lacrimal sac and terminates at a small ostium on the lateral wall of the nasal cavity, located in the inferior meatus just beneath the inferior nasal concha. That placement makes it the structure that opens directly into the inferior meatus. The other options don’t serve as an opening for a duct into this space. The sphenopalatine foramen connects the pterygopalatine fossa with the nasal cavity to transmit nerves and vessels, not tears. The hard palate forms the floor of the nasal cavity, not an opening into the inferior meatus. And the inferior meatus is a space, not a structure that opens into itself.

Tears are drained from the eye through the nasolacrimal apparatus and end in the nasal cavity via a specific opening. The nasolacrimal duct carries tears from the lacrimal sac and terminates at a small ostium on the lateral wall of the nasal cavity, located in the inferior meatus just beneath the inferior nasal concha. That placement makes it the structure that opens directly into the inferior meatus.

The other options don’t serve as an opening for a duct into this space. The sphenopalatine foramen connects the pterygopalatine fossa with the nasal cavity to transmit nerves and vessels, not tears. The hard palate forms the floor of the nasal cavity, not an opening into the inferior meatus. And the inferior meatus is a space, not a structure that opens into itself.