What is the internal nose?

The internal nose, also known as the nasal cavity, is the space within the nose that extends from the nostrils to the throat. It is lined with mucous membranes and contains structures such as the nasal conchae, which help filter, warm, and humidify inhaled air. The internal nose also plays a crucial role in the sense of smell, as it houses olfactory receptors that detect airborne chemicals. Additionally, it connects to the paranasal sinuses and the throat, contributing to various functions like respiration and phonation.