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<big> '''What are the gross defence mechanisms in the upper respiratory tract?'''
<big> '''What are the gross defence mechanisms in the upper respiratory tract?'''
<font color="white"> '''''
<font color="white">
*'''''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#Defense mechanisms|Link to Answer Article]]
[[Diseases of the nasal cavity and sinuses#Defense mechanisms|Link to Answer Article]]