How does the upper respiratory system support good health?

by moistening, heating, and purifying air as it proceeds down the airways

by removing dangerous carbon dioxide gases built up in the tissues

by providing oxygen to the cells

by preventing people from swallowing air

by moistening, heating, and purifying air as it proceeds down the airways

Explanation:

The upper respiratory system support good health by moistening, heating, and purifying air as it proceeds down the airways.

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