Changes

<font color="white"> '''''

<font color="white"> '''''

*Particle deposition

*Particle deposition

#Mucociliary escalator

*Mucociliary escalator

#Mucus

*Mucus

#Commensal bacteria

*Commensal bacteria

#Reflexes''''' </font></big>

*Reflexes''''' </font></big>

[[Diseases of the nasal cavity and sinuses#Defence mechanisms|Link to Answer Article]]

[[Diseases of the nasal cavity and sinuses#Defense mechanisms|Link to Answer Article]]