Human Anatomy
Human Anatomy
9th Edition
ISBN: 9780135168059
Author: Marieb, Elaine Nicpon, Brady, Patricia, Mallatt, Jon
Publisher: Pearson Education, Inc.,
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Chapter 22, Problem 12RQ
Summary Introduction

To review:

The functional reason behind the opposite orientation of cilia below and above the larynx.

Introduction:

The upper and lower respiratory passages have cilia that help in clearing the passages of dust, pollen, and other particles after they are trapped in a viscous layer of mucus. The location of the structure in the respiratory passage determines whether the cilia will move in an upward or downward direction.

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