Ciliated Epithelium

The cilia in the nasal cavity are also found in other parts of the respiratory tract. This ciliated epithelium also lines the trachea, bronchi and larger bronchioles.

The cilia are found throughout the respiratory passages and carry out the following functions on incoming air:

  • Filtering
  • Warming
  • Moistening

Close-up of cilia. See below for animated version

Human chest with lungs superimposed  on top

Now consider what would happen if you breathed in cold dry air.

Move onto the next page to find out the answer.

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