you don't breath in air with the help of your nose the time.
The nose hairs help filter the air you breath.
the veins in your body take air from your nose into the lungs
They help to filter out dust from the air we breath.
the nose does not help us breath. it's function is to warm, humidify, and filter the air to the lungs. thus said, it is better to breath through the nose for its benefits, rather than mouth breath which provides no protective filtration of the air.
The nose breathe air in. Sometimes you do the same with the mouth.
when you breath in throught the nose all of that oxygen from the air comes from the oxygen and carbon dioxide that other people breath in.
Through your mouth/nose when you breath.
By using their nose to breath of course
the nose hair cleans the air you breath in there
Piranha's are fish, and fish filter air from the water through their gills.
horse
The nose and nasal passages have hairs and mucous designed to filter the air.