Both important: They are both very important to keeping you alive! oxygen is necessary for your brain cells to work properly. The nervous system (and particularly the brain stem) controls your breathing, the movement of your chest, the circulation of your heart, and oxygen going to your brain. They all have to work together.
Answered 4/15/2018
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A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
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