Biology- The Heart Questions about the heart 3.0 / 5 based on 1 rating ? BiologyCirculationGCSEEdexcel Created by: tasha_0803Created on: 16-01-15 18:17 Through which main blood vessel does de-oxygenated blood return to the heart? The vena cava. 1 of 5 What is the name of the vessel that pumps blood to the lungs? The pulmonary artery. 2 of 5 Why is the heart seperated into two sections? One section (the left side) contains oxygenated blood and the other (the right) contains de-oxygenated blood. 3 of 5 Why do ventricles have thicker walls? They have to contract to pump the blood all around the body at a high pressure. 4 of 5 Why are there valves in the heart? To prevent the back-flow of blood. 5 of 5
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