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Functions of respiratory passage

  • Humidification of inspired air

  • Modification of temperature (cool or warm) of the inspired air.

  • Filtration of dust particles (Prevent foreign bodies) from reaching the alveoli

    • Particles > 10 μm in diameter are strained out by hairs in the nostrils or settle down on mucous membrane in the nose and pharynx.

    • Particles 2 to 10 μm in diameter falls on the wall of bronchi as air flow slows here they are… (88 more words) …

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