Respiratory system

What lines the tubes of the respiratory tree?

Asked by arwen46 12 years ago 4/13/2013 12:05 PM

Last updated by anonymous 12 years ago 4/14/2013 10:43 PM

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Answered by Dr. John Carmen 12 years ago 4/14/2013 10:43 PM

Cilia line the tubes of the respiratory tree.