Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Nasal Cancer ?
    ### Response:
    Your paranasal sinuses are small hollow spaces around the nose. They are lined with cells that make mucus, which keeps your nose from drying out. The nasal cavity is the passageway just behind your nose. Air passes through it on the way to your throat as you breathe.
    