Simplify the following text for a Grade 8 native English-speaking person.
Original: Cilia and mucus along the inside wall of the nasal cavity trap and remove dust and pathogens from the air as it flows through the nasal cavity .
Simplified: Cilia ( small hairs ) and mucus along the inside wall of the nasal cavity trap and remove dust and germs from the air as it flows through the nasal cavity .