Dictionary Home »
Images » respiration images
respiration images
respiration
During inhalation (top), the diaphragm descends and air fills the lungs. During exhalation (bottom), the diaphragm rises and the lungs expel air.
The American Heritage® Science Dictionary
Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
More respiration images
Learn more about respiration