最終更新日：2024/07/28
The alveolus is the tiny air sac in the lungs where gas exchange occurs.
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The alveolus is the tiny air sac in the lungs where gas exchange occurs.
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The alveolus is the tiny air sac in the lungs where gas exchange occurs.
The alveolus is the tiny air sac in the lungs where gas exchange occurs.
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