| The openings of the sac become the external nares, and the cavity of the sac becomes the nasal cavity. |
| In mammals, the ethmoid ossifies to form the turbinals, convoluted bones in the nasal cavity that are covered by olfactory sense organs. |
| The olfactory organ is located in the mucous membrane lining the uppermost part of the roof of the nasal cavity. |
| Polyps are visualized as pale, grapelike structures prolapsing into the nasal cavity from the middle meatus. |
| Together with the vomers, the septomaxilla forms the floor of the nasal cavity and encloses the vomeronasal organ. |
| Also, the nasal cavity can be closed thus preventing vowels from being nasalised and thus increasing their comprehensibility. |
