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. Bronchioles C. Trachea B. Alveoli D. Larynx
Alveoli is made up of tiny air sacs where oxygen and carbon dioxide are exchanged.
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thederby|Points 1499|
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Asked 10/9/2012 12:30:41 PM
Updated 1/13/2015 12:47:51 PM
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This answer has been confirmed as correct and helpful.
Edited by yumdrea [1/13/2015 12:47:50 PM], Confirmed by yumdrea [1/13/2015 12:47:51 PM]
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Updated 2/19/2018 6:48:46 AM
1 Answer/Comment
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Added 2/19/2018 6:21:28 AM
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1 Answer/Comment

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Added 10/21/2017 10:26:49 AM
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