Ans: The nasal cavity is a structure located in the nose of human beings. It is one of the most important organs that make up the olfactory as well as the respiratory system. The nasal skeleton that is a part of the nose contains the nasal chamber. There are four different functions of the nasal cavity. It helps in keeping the inspired air warm and humidified. The walls of the nasal cavity tend to hold the air for a longer duration of time in the nasal cavity and that leads to more humidification. Also, when the nasal cavity absorbs the air, it also removes the pathogens and unwanted particles that might be present in the air. Not to mention that it also provides the nose’s sense of smell. Along with that, it drains the lacrimal ducts and paranasal sinuses.