The nasal cavity includes the bones, tissues, and other structures that make up the inside of the nose. It warms and humidifies the air you breathe. The nasal cavity is a large, air-filled space located above and behind the nose in the middle of the face. As the primary entry point for air into the respiratory system, it performs several crucial functions: Air Conditioning: It warms and humidifies inhaled air to protect the delicate tissues of the lower respiratory tract. Filtration: Hairs in the vestibule and the mucus lining trap dust, pollen, and other airborne particles. Sense of Smell: The olfactory region at the top of the cavity ... The nasal cavity is a large, air-filled space located behind the external nose that serves as the primary entry point for inhaled air. It is the beginning of the respiratory tract, where air is filtered, humidified, and warmed before reaching the lungs. It constitutes the upper respiratory system and the paranasal sinuses, oral cavity, pharynx, and larynx and is the first of the respiratory tract structures. Anatomy and physiology The nasal cavity heats and humidifies the inspired air and filters small particles into the air before the air reaches the lung. The nasal cavity is lined with the same columnar epithelium that lines the lung’s airways.
