Nasal cavity

Definition

The nasal cavity is a hollow space within the nose and skull that is lined with mucous membranes and cilia. It functions to warm, moisten, and filter the air entering the respiratory system.

5 Must Know Facts For Your Next Test

1. The nasal cavity is divided into two sections by the nasal septum.
2. Cilia in the nasal cavity move mucus and trapped particles towards the throat for expulsion.
3. The nasal cavity connects to several paranasal sinuses, which help lighten the skull and enhance voice resonance.
4. Olfactory receptors located in the upper part of the nasal cavity are responsible for the sense of smell.
5. Goblet cells in the mucous membrane produce mucus that traps dust, pathogens, and other airborne particles.

Review Questions

• What primary functions does the nasal cavity serve in respiration?
• How do cilia in the nasal cavity contribute to respiratory health?
• Where are olfactory receptors located and what role do they play?

Related terms

pharynx:

A muscular tube that connects the nasal cavity and mouth to the larynx and esophagus.

larynx:

Also known as the voice box, it houses vocal cords and connects the pharynx to the trachea.

trachea:

A large membranous tube reinforced by rings of cartilage, extending from the larynx to bronchial tubes; also called windpipe.