Heart and Circulation 4.0 / 5 based on 1 rating ? BiologyHuman, animal and plant physiologyASEdexcel Created by: dljones3Created on: 18-05-14 15:14 What is one reason why diffusion may be inadequate for some organisms to receive oxygen and get rid of waste substances? The organism is too large 1 of 10 The blood circulating in large open spaces describes what type of circulatory system? Open circulatory System 2 of 10 The blood passing through the heart once for every complete circuit of the body describes what type of circulation? Single 3 of 10 Which vessel has a thicker muscular wall? Artery 4 of 10 Which vessel has a narrow lumen? Artery 5 of 10 Which vessel has valves? Vein 6 of 10 Which vessel has less collagen, elastic fibres and smooth muscle? Vein 7 of 10 Which blood vessels supply the heart muscle with blood? Coronary Arteries 8 of 10 What are the valves called between the ventricles and the arteries? Semi lunar valves 9 of 10 What are the valves called between the atria and the ventricles? Atrioventricular valves 10 of 10
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