All open into middle meatus except
THE FOLLOWING FEATURES ARE: 1.Ethmoidal bulla 2.Hiatus semilunaris 3.Infundibulum 4.Opening of frontal air sinus 5.Opening of anterior ethmoidal sinus 6.Opening of maxillary sinus Ref BDC volume 3,sixth edition pg 243
Frontal sinus
Sphenoid sinus
Maxillary sinus
Ethmoidal sinus
Head and neck