The nose It is an organ of the respiratory system that is located in the central part of the face. It consists of a bony and cartilaginous structure covered by skin and mucosa, and is divided into two nasal cavities that are separated by a nasal septum. The nose has several functions, such as the sense of smell, the filtration and humidification of the inspired air, and the regulation of the temperature and humidity of the air that is inhaled. It is also an important element in facial cosmetic appearance.