In aquatic ancestors, olfactory organs were often internal gills. One nostril may be slightly more congested or have higher airflow than the other at any given time.
How Nostrils Warm Filter Air
The nasal passages add moisture to prevent the delicate tissues of the lungs from drying out. This asymmetry is often temporary and part of the normal cycle of the nasal passages.
Because they are exposed to the external environment, the nostrils are susceptible to a variety of conditions. Internally, the pathway leads past the nasal vestibule, a region lined with coarse hairs (vibrissae) and sebaceous glands, and into the nasal cavity proper.
How Nostrils Warm and Filter the Air You Breathe
One nostril may be slightly more congested or have higher airflow than the other at any given time. The migration of these sensory organs to the front of the face in land animals allowed for the simultaneous processes of breathing and smelling.
More About What is nostrils
Looking at What is nostrils from another angle can help expand the discussion and give readers a second clear paragraph under the same section.
More perspective on What is nostrils can make the topic easier to follow by connecting earlier points with a few simple takeaways.
