Answer:
They convert glucose into usable energy.
Explanation:
I'm going out to the bathroom house gym
I think a parent's would communicate better with there kids as friends. because friends talk better with other friends because they are more open. As for kids and parent's they don't get along very well sometimes because the kid thinks the parent's are to bossy or whatever..etc.
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If the blood is carrying oxygen, the cell and the blood will have a sort of trade. The cells will give the blood the waste which will leave the body and the blood will give the cell oxygen which it needs to stay alive and continue to work.