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Biology, 16.09.2019 19:50 noriko002

What is the main function of the respiratory system?
select one:
a. supply oxygen to cells for cellular respiration
b. circulate blood through the blood vessels
c. rid the blood of water and metabolic wastes
d. decrease moisture stored in the blood and lungs

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What is the main function of the respiratory system?
select one:
a. supply oxygen to...
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