Chapter 34 The Circulatory Respiratory and Excretory Systems
Chapter 34 The Circulatory Respiratory and Excretory Systems
Chapter 34 The Circulatory Respiratory and Excretory Systems
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<strong>Chapter</strong> <strong>34</strong><br />
<strong>Circulatory</strong>, <strong>Respiratory</strong>, <strong>and</strong> <strong>Excretory</strong> <strong>Systems</strong><br />
<strong>34</strong>.2 <strong>Respiratory</strong> System<br />
Air enters your mouth or nose.<br />
Hairlike structures called cilia trap foreign<br />
particles from the air <strong>and</strong> sweep them<br />
toward the throat.<br />
Filtered air then passes through the upper<br />
throat called the pharynx.
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