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: 23



Work Step by Step

Option b. is incorrect. The lymph nodes are bean-shaped structures throughout the body and connected to the lymph vessels that collect and destroy pathogens and cancer cells. Option c. is incorrect. Capillaries are tiny blood vessels that are the sites of exchange of nutrients, gases, and waste products. Option d. is incorrect. The bronchioles are small tubes that branch off from larger bronchi and transport air to the alveoli. Option a. is correct. Alveoli are tiny air sacs located in the lungs and are the sites of gas exchange.
Update this answer!

You can help us out by revising, improving and updating this answer.

Update this answer

After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.