Answer- Every single cell in your body relies on blood to keep it alive. Blood brings in food and oxygen and takes away waste. The ateries carry blood to smaller and smaller vessels until each cell has been fed.
Every part of your body has small veins that connect to the larger ones you can see under your skin. It’s like a road map. Every house [cell] has a path leading to it, and all those paths lead to larger and larger roads.
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