The Thin-Walled Sac Where Oxygen and Carbon Dioxide Are Exchanged

question 29

Multiple Choice

The thin-walled sac where oxygen and carbon dioxide are exchanged with the blood in the pulmonary circulatory system is a(n)

• A) bronchiole
• B) alveolus
• C) tertiary bronchus
• D) alveolar duct

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Definitions:

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