B2 - Circulation 0.0 / 5 ? BiologyCirculationGCSEAQA Created by: emilym2244Created on: 27-04-18 18:48 What is the role of the heart? . 1 of 5 What is the structure of the heart? . 2 of 5 Why is the circulatory system described as double? . 3 of 5 What is the role of the pacemaker in the heart? . 4 of 5 What is the structure of arteries and how does this relate to their function? . 5 of 5
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