Final answer:
The nasolacrimal duct carries tears from the lacrimal gland to the nasal cavity, opening behind the inferior nasal concha.
Step-by-step explanation:
The nasolacrimal duct is part of the nasolacrimal drainage system which is responsible for carrying tears from the lacrimal gland to the nasal cavity. This duct begins at the lacrimal sac, which receives tears from the lacrimal puncta located at the medial (inner) corners of the eyelids. The nasolacrimal duct then extends downward within the nasolacrimal canal, which passes through the lacrimal bone, and opens into the nasal cavity just behind the inferior nasal concha.