næsegangens

Næsegangen, often translated as nasal passage or nasal cavity, refers to the internal space within the nose. It is a crucial part of the respiratory system and plays a significant role in olfaction, the sense of smell. The nasal cavity is lined with a mucous membrane that helps to humidify inhaled air, trap dust and debris, and warm the air before it reaches the lungs. This moist environment also contains cilia, tiny hair-like structures that continuously sweep trapped particles towards the throat to be swallowed or expelled.

Within the nasal passages are structures called turbinates or conchae, which are bony projections that increase the surface area of the nasal cavity. This increased surface area allows for more efficient warming and humidification of air. The olfactory epithelium, responsible for detecting smells, is located in the upper part of the nasal cavity. Nerves from this epithelium transmit scent information to the brain.

The nasal passages are connected to the paranasal sinuses, air-filled cavities within the bones of the skull, which also contribute to warming and humidifying air. They are also connected to the nasopharynx, the upper part of the throat, facilitating the passage of air to the lungs and the drainage of mucus. Blockage or inflammation of the næsegangene, such as that caused by a cold or allergies, can significantly impact breathing and the sense of smell.