Biology 2010 Student Edition

Published by Prentice Hall
ISBN 10: 9780133669510
ISBN 13: 978-0-13366-951-0

Chapter 33, Circulatory and Respiratory Systems - Assessment - 33.3 The Respiratory System - Understand Key Concepts/Think Critically - Page 973: 24



Work Step by Step

Option b. is incorrect. The pharynx is the portion of the throat that leads to the larynx. The pharynx is where both food and air go down. When we eat, a piece of tissue called the epiglottis covers up the entry into the trachea to prevent food from going down the wrong pipe and into the lungs. Option c. is incorrect. The trachea is the windpipe and is connected to the larynx. Option d. is incorrect. The bronchi are the large tubes that branch off from the trachea. Option a. is correct. The larynx, also called the voice box, is the upper part of the trachea that contains the two flaps of tissues called the vocal cords. The vocal cords allow us to manipulate air to produce speech and song.
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