This model shows the external and internal structures of the nasal cavity. 1. External nose: shows the section of the nasal bones and cartilages. 2. Nasal cavity: on the lateral nasal wall show the superior, middle and inferior nasal chonchae project medially into the nasal cavity forming the superior, middle and inferior nasal meatuses. 3. Paranasal sinuses: shows the frontal, sphenoid and maxillary sinuses. Magnified 1/2 the natural size. Made of PVC.