blood vessels 0.0 / 5 ? BiologyCells, tissues and organsCirculationGCSEAQA Created by: :-DCreated on: 21-04-18 16:01 What blood vessel takes blood back to the heart veins 1 of 6 what keeps blood flowing in the right direction valves 2 of 6 what forms a huge network linking veins and arteries capillaries 3 of 6 capillaries have __________ walls permeable 4 of 6 arteries contain _____ layers of muscle arteries 5 of 6 arteries carry blood ____ from the heart away 6 of 6
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