The frontonasal duct is a communication between the
frontal air sinuses and their corresponding nasal cavity. The duct is lined by
mucous membrane
A mucous membrane or mucosa is a membrane that lines various cavities in the body of an organism and covers the surface of internal organs. It consists of one or more layers of epithelial cells overlying a layer of loose connective tissue. It i ...
. The duct empties into the nasal cavity
middle nasal meatus through the infundibulum of the
semilunar hiatus.
Bones of the head and neck
{{Respiratory-stub