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Question
In the respiratory system, the primary sites of gaseous exchange with blood vessels are:
In the respiratory system, the primary sites of gaseous exchange with blood vessels are:
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Solution
The correct option is B Alveoli
The passages within lungs divide into smaller and smaller tubes to finally form sac-like structures called alveoli, which are the primary sites of gaseous exchange.
Alveoli
The passages within lungs divide into smaller and smaller tubes to finally form sac-like structures called alveoli, which are the primary sites of gaseous exchange.
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