kaitlyn112005 kaitlyn112005

12-11-2020
Chemistry

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The system brings molecules to the cells. It includes blood vessels and the heart.
respiratory system
digestive system
circulatory system
nervous system

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kennashaff kennashaff

12-11-2020

i think it’s the circulatory system. it delivers oxygen and nutrients to the cells and pumps blood to the heart. hope this helps:)

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