At the ends of the bronchioles are clusters of little pockets that collect the air, called alveoli.
Physiology of Breathing
By Lori Alma, About.com
Updated: September 22, 2008
About.com Health's Disease and Condition content is reviewed by the Medical Review Board
Explore Cystic Fibrosis
Must Reads
About.com Special Features
Learn how you can reduce your your numbers with these nutrition and exercise tips. More >
Keep yourself, and your family, happy and healthy this fall with these tips. More >
Also from About.com:
©2009 About.com, a part of The New York Times Company.
All rights reserved.