All open into hiatus semilunaris except
Hiatus semilunaris. The hiatus semilunaris is a semicircular shaped openinglocated on the lateral wall of the nasal cavity. It is a component of the ostiomeatal complex and serves as the opening for the frontal and maxillary sinuses and the anterior ethmoid air cells.
Posterior ethmoid sinus
Anterior ethmoid sinus
Frontal sinus
Maxillary sinus