Biology 2010 Student Edition

by Miller, Kenneth R.; Levine, Joseph S.

Published by Prentice Hall

ISBN 10: 9780133669510

ISBN 13: 978-0-13366-951-0

Chapter 33, Circulatory and Respiratory Systems - 33.3 - The Respiratory System - 33.3 Assessment - Page 969: 2a

Answer

Lungs have numerous tiny air sacs called alveoli surrounded by blood capillaries. Exchange of oxygen and CO2 takes place in these alveoli. Oxygen is inhaled and CO2 is exhaled.

Work Step by Step

As above

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