Nose nasal cavities diagram

In this article, we shall look at the anatomy of the nasal cavity – its divisions, structure and neurovascular supply. The nasal cavity is the most superior part of the respiratory tract. It extends from the vestibule of the nose to the nasopharynx, and has three divisions:
The nasal cavity has four functions: 1 Warms and humidifies the inspired air. 2 Removes and traps pathogens and particulate matter from the inspired air. 3 Responsible for sense of smell. 4 Drains and clears the paranasal sinuses and lacrimal ducts.
One of the functions of the nose is to drain a variety of structures. Thus, there are many openings into the nasal cavity, by which drainage occurs. The paranasal sinuses drain into the nasal cavity.