The nose has several important functions, including:

• Respiration: The nose allows air to enter the body and filters debris, warms and moistens the air before it reaches the lungs.

• Defense against particles: The nose filters out dirt, allergens, and other particles from the air we breathe.

• Sense of smell: The nose contains the olfactory organ, which allows us to detect and identify different smells.

• Facial appearance: The nose is a prominent aspect of facial appearance.

The nasal cavity has an abundant supply of vasculature to aid in functions of warming and humidifying inhaled air. It allows the mucosa to enlarge and shrink, under the influence of sympathetic innervation. The arterial supply to the nose and nasal cavity originates from the internal and external carotid arteries.

Understanding the anatomy, physiology, and function of a properly functioning nasal cavity is essential in diagnosing and treating underlying pathology. If you experience any symptoms in your nose, such as a stuffy nose, nosebleed, or pain, it is recommended to talk to a healthcare provider.