The left middle and superior conchae have been cut away and ethmoidal air cells widely opened. A window has been cut through the inferior concha to reveal the position of the nasal opening of the nasolacrimal canal (24). The specimen is viewed from the right side.
Posterior ethmoidal foramen
Ethmoidal cells (posterior)
Sphenoid sinus left
Line of attachment of superior nasal concha
Superior nasal meatus
Sphenopalatine foramen
Upper pointer: Line of attachment of middle nasal concha Lower pointer: Middle nasal meatus
Maxillary sinus
Ethmoidal process inferior nasal conchae
Medial plate of pterygoid process
Perpendicular part palatine bone
Palatomaxillary suture
Upper pointer: Position of greater palatine foramen Lower pointer: Horizontal plate palatine bone
Upper pointer: Orbital part of frontal bone Lower pointer: Anterior ethmoidal foramen
Frontal sinus
Ethmoidal cells (anterior)
Opening of frontonasal duct into frontal recess of middle nasal meatus
Hiatus semilunaris
Ethmoidal bulla
Ethmoidal infundibulum
Uncinate process ethmoid bone
Lacrimal bone
Lacrimal process inferior nasal conchae
Nasal opening of nasolacrimal canal visible through window cut in inferior concha)