How many cavities does the human nose have?

The human nose contains several cavities, primarily the nasal cavity, which is divided into two halves by the nasal septum. Each half of the nasal cavity has three turbinates (or conchae) that help filter, warm, and humidify incoming air. Additionally, the nose is connected to the paranasal sinuses, which are air-filled spaces that include the maxillary, frontal, ethmoid, and sphenoid sinuses. Overall, while the primary cavity is the nasal cavity, the associated sinuses contribute to the overall structure of the nasal area.