Question and answer
What part of the lower respiratory tract is made up of tiny air sacs where oxygen and carbon dioxide are exchanged? A. Trachea B. Alveoli C. Bronchioles D. Larynx
Alveoli is made up of tiny air sacs where oxygen and carbon dioxide are exchanged.
thederby|Points 1530|
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Asked 2/11/2013 11:58:11 AM
Updated 12/14/2017 5:00:01 AM
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This answer has been confirmed as correct and helpful.
Edited by Masamune [12/14/2017 5:00:00 AM], Confirmed by Masamune [12/14/2017 5:00:01 AM]
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