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22-01-2018
Biology

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what system is it: Regulating oxygen and carbon dioxide
A circulatory system
B repiratory system
C muscular system
D Skeletal system
E Nervous System
F digestive system
G excretory system

Respuesta :

hmoovp2qew1 hmoovp2qew1

22-01-2018

It should be the respiratory system. The respiratory system controls the amount and exchange rate of oxygen and CO2 in your body by breathing.

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