por Bruna Vocaturo hace 4 años
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por Andrew wang
por Ragubavan Sathurtheha
por Mark B Ness
por EMILY CRISTINA MOLINA
exchange oxygen with carbon dioxide
they forces the air straight to the alveolus
forces the air to breath
conveys and cleans the air and expels the solid parts
recive air and regulates the sound of the voice
recive the air
humidify
purify
REGULATION