The Heart 0.0 / 5 ? BiologyThe HeartAll LevelsAll boards Created by: hellomofoCreated on: 18-09-13 16:15 What is the hearts main purpose? To pump blood around the body 1 of 5 What controls the contraction of the cardiac muscle cells? The Sinoatrial node 2 of 5 What is the main pumping chamber of the heart? The left ventricle 3 of 5 What prevents blood from flowing back from the ventricles to the atria? The atrioventricular valves 4 of 5 What are the two large vains called which recieve de-oxygenated blood? The superior vena cava and the inferior vena cava 5 of 5
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