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Which structure of the respiratory system plays the main role in carry out the system’s primary function?
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Which structure of the respiratory system plays the main role in carry out the system’s primary function?

User Don Werve
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4 votes

The answer is C alveoli

have a great day :)

User Katisha
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6 votes
alveoli, the tiny air sacks in your lungs
User Bitinerant
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