Nasal passage

Nasal Passage

The nasal passage is a channel of the respiratory system that serves as the pathway for the inhaled air, from the nostrils to the nasopharynx. It is a vital component of the body's respiratory system, playing a significant role in the process of respiration and the sense of smell.

Anatomy

The nasal passage is divided into two sections by the nasal septum, a wall of cartilage. Each section, known as a nasal cavity, begins at the nostril (or naris) and ends at the nasopharynx. The walls of the nasal cavities are lined with mucous membrane, which helps to humidify the air and trap foreign particles.

The floor of the nasal passage is formed by the palate, which separates the nasal cavity from the oral cavity. The roof is formed by parts of the ethmoid bone and the sphenoid bone.

Function

The primary function of the nasal passage is to act as a conduit for air to travel from the nostrils to the lungs. The nasal passage also warms, moistens, and filters the inhaled air, preparing it for the lungs. The olfactory epithelium, located in the upper part of the nasal passage, is responsible for the sense of smell.

Health and Disease

The nasal passage can be affected by various health conditions, including allergies, sinusitis, nasal polyps, and deviated septum. Treatment for these conditions can range from medication to surgery, depending on the severity and the specific condition.

See Also

• Respiratory System
• Nasal Cavity
• Nasal Septum
• Olfactory Epithelium