The respiratory system. 

 - Chicago :  World Book,  c2007. 
 - 48 p. :  col. ill ;  28 cm. 
 - World Book's human body works .
 - World Book's human body works. .
<br/><br/>Includes bibliographical references (p. 47) and index. 
<br/><br/>In, out, in, out -- The respiratory system -- Nose and throat -- Looking at the lungs -- Breathing in -- Breathing out -- Controlling respiration -- Lung defenses -- Breathing faster and slower -- Making noises -- Absorbing area -- Gas exchange -- Gases in the blood -- Cellular respiration -- Energy factories -- Lung problems -- Problems caused by the environment -- Improving the lungs -- Breathing at great heights -- Breathing underwater -- Healthy lungs. 
<br/><br/><label>ISBN: </label>0716644282 9780716644286 
<br/><br/><label>LCCN: </label>2006004691 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Respiratory organs--Juvenile literature.
<br/><br/><label>LC Class. No.: </label>QP121  / .R466 2007 
<br/><br/><label>Dewey Class. No.: </label>612.2