give reason :
nasal passage is lined with mucus.
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The nasal passage is lined with mucus to keep the it clean and to collect irritants such as pollen and dust.
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Fine hair and mucus act as the first line of defense in the nasal passage. They keep foreign particles that could cause illness from entering the body. The hairs (cilia) and mucus along the nasal cavity are responsible for trapping dust and other particles in the air you inhale and sweeping it out again.
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emmy11:
Nasal passage is the entry point for inspired air.it is lined with mucus which provide barriers for mechanical protection from the invasion of infectious and allergenic pathogens
right
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