19 Ethmoid Bone – ethmoid labyrinth Largest part of ethmoid boneDescend inferiorly from the cribriform plateEthmoid paranasal sinuses located withinForm 2 major structure within nasal cavitySuperior nasal conchaMiddle nasal concha
20 Lacrimal BoneSmall and rectangular in shapeInferior part of lacrimal form small portion of lateral wall of nasal cavity
21 Inferior Nasal ConchaA curved bone that form part of lateral wall of nasal cavityArticulate with maxilla and perpendicular plate of palatine, lacrimal, and ethmoid bone
22 Palatine Bone – Perpendicular plate Shape of vertical rectangleSuperior border is a notch articulate with sphenoid bone, form sphenopalatine foramenForm part of lateral wall of nasal cavity
23 ReferenceNetter’s Head and Neck Anatomy for Dentistry
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