Biology 12th Edition

Published by McGraw-Hill Education
ISBN 10: 0078024269
ISBN 13: 978-0-07802-426-9

Chapter 35 - Respiratory Systems - Assess - Page 675: 2

Answer

B

Work Step by Step

Birds have a single-route respiratory system, meaning air only flows one way through their lungs. This type of respiration is very efficient because it prevents the mixing of oxygenated and deoxygenated air.
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.