Nasal cavity

Definition

The nasal cavity is a hollow space within the nose and skull lined with mucous membrane, responsible for filtering, warming, and humidifying the air we breathe. It plays a crucial role in respiration and in the sense of smell.

5 Must Know Facts For Your Next Test

1. The nasal cavity is divided into two sections by the nasal septum.
2. It contains structures called turbinates or conchae that help to humidify and filter inhaled air.
3. The olfactory epithelium located in the upper part of the nasal cavity is essential for the sense of smell.
4. Mucus produced by goblet cells in the lining traps dust, pathogens, and other particles.
5. The nasal cavity connects to the pharynx at its posterior end, allowing air to pass into the respiratory tract.

Review Questions

• What structures within the nasal cavity help to humidify and filter inhaled air?
• Explain how the nasal cavity contributes to both respiration and olfaction.
• Where is mucus produced in the nasal cavity, and what is its function?

Related terms

Pharynx:

The muscular tube that connects the nasal cavity to the larynx and esophagus, playing roles in both respiration and digestion.

Olfactory Epithelium: A specialized tissue inside the nasal cavity responsible for detecting odors.

Turbinates: Curved bone structures within the nasal cavity that help warm, moisten, and filter incoming air.