Step I Cilia in respiratory tree

[JK270]

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Where is cilia terminated? In FA (p. 600), it mentions that pseudostratified ciliated columnar cells extend to beginning of terminal bronchioles (conducting zone) and cilia terminate in respiratory bronchioles (respiratory zone). I thought there is no cilia in respiratory zone.

 

[pd1112]

You thought wrong. First Aid is right.

 

[JK270]

So Cilia extends from nose to respiratory bronchioles? Thanks!