Nose: anatomical and functional
As the air passes through the nose, specialized cells of the olfactory system, the brain recognize and identify odours, the hairs in the nose clear the air of foreign particles.
The nose is the body's main organ in odour and also functions as part of the body's respiratory system.
The air enters the body through the nose. As it passes through specialized cells of the olfactory system, the brain recognizes and identifies odours. Hair in the nose clears the air of foreign particles. As the air travels through the nasal passages, it is warmed and moistened before it enters the lungs.
The most common medical condition related to the nose is a stuffy nose. This can be caused by colds or flu, allergies or environmental factors, leading to rhinitis. The body's response to obstruction is a seizure that pushes air through the nose with a sneeze.
Nosebleeds, known medically as epistaxis, is the second most common medical problem of the nose. As many as 60 percent of people report experiencing nosebleeds, with the highest rates found in children under 10 years old and adults over 50 years old.