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Questions and Answers
What is the largest airway that communicates with the external environment in land animals?
Where does gas exchange occur in the lungs of mammals and reptiles?
What brings the air into close contact with the blood in the respiratory system?
What are the microscopic air sacs called in birds that open into the atria for gas exchange?
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Which part of the respiratory system is responsible for pumping air from the environment into the alveoli or atria?
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