What is the purpose of having two nostrils?

The human nose has two nostrils, one on each side of the nasal septum. The nostrils are the external openings of the nasal cavity, which is the large air-filled space behind the nose. The primary function of the nostrils is to allow air to enter and exit the nasal cavity during breathing. But why do we need two nostrils instead of just one?

The two nostrils are not just mirror images of each other, but are actually slightly different in shape and size. This asymmetry allows for more efficient and effective breathing. When we breathe through our nose, the air flows in a complex pattern that helps to filter, warm, and humidify the air before it reaches the lungs. The two nostrils work together to create a swirling airflow that helps to capture particles and pollutants, as well as optimize the exchange of oxygen and carbon dioxide in the body.

Having two nostrils also allows us to detect and identify a wider range of smells. Our sense of smell is linked to our ability to taste, and having two nostrils that work together helps us to fully experience the flavors of food and drink.