Kaila9111 Kaila9111

25-09-2017
Physics

contestada

The cardiovascular system works closely with the __ system, which takes oxygen out of the air and makes it available for our cells to use.

A. Endocrine
B. Excretory
C. Digestive
D. Respiratory

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greenbeanzoie greenbeanzoie

25-09-2017

The Answer Is Respiratory System

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