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Where does gas exchange occur in the lungs of land animals?
Where does gas exchange occur in the lungs of land animals?
What is the largest hollow tube that communicates with the external environment in the respiratory system?
What is the largest hollow tube that communicates with the external environment in the respiratory system?
What do the microscopic air sacs in the lungs have a rich supply of?
What do the microscopic air sacs in the lungs have a rich supply of?
In which organisms does the anatomy and physiology of the respiratory system vary greatly?
In which organisms does the anatomy and physiology of the respiratory system vary greatly?
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What are the air sacs called in birds for gas exchange in the lungs?
What are the air sacs called in birds for gas exchange in the lungs?
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