The primary function(s) of the respiratory system is (are):
to move air to and from the exchange surfaces
to provide an area for gas exchange between air and circulating blood
to protect respiratory surfaces from dehydration and environmental variations
to provide structures for phonation
all of the choices are correct
all of the choices are correct:
to move air to and from the exchange surfaces
to provide an area for gas exchange between air and circulating blood
to protect respiratory surfaces from dehydration and environmental variations
to provide structures for phonation
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