Human Nasal Cavity Model: This model helps the students to understand 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.