1. What is the difference between an artery and a vein? Arteries carry blood towards the heart, veins away from the heart. Arteries carry blood away from the heart, veins towards the heart. Arteries carry oxygenated blood, veins deoxygenated blood. Arteries carry deoxygenated blood, veins oxygenated blood.

2. In which of these blood vessels is the average speed of blood flow the slowest? capillaries large veins arteries small veins

3. How does the volume of blood per hour flowing up the blood vessels in your leg compare to the volume of blood per hour flowing down the blood vessels in your leg? They are the same, obviously. Less blood flows up your leg. More blood flows up your leg. Sometimes more, sometimes less, it varies from one hour to the next.

4. In which of these blood vessels is the blood pressure highest? aorta capillary beds pulmonary artery vena cava

5. The main veins contain valves to stop blood flowing backwards. How do these valves work? They are worked by muscles in the wall of the vein. They opened or closed by associated ligaments. They are controlled by peristaltic waves. They are pushed open or closed by the blood pressure.

6. What is the name of the innermost layer of an artery wall? tunica intima tunica media tunica adventitia lumen

7. What is coronary heart disease? where blood is prevented from returning to the heart in the veins where the arteries supplying blood to the heart become narrowed or blocked where one or more of the heart valves becomes damaged where the muscle of the heart chambers degenerates

8. Where are the vasa vasorum? in the heart in varicose veins in the walls of the arteries in the vas deferens

9. In adults, what is the function of the vessel called the ductus arteriosus? It has no function. It supplies oxygen to the heart muscle. It carries blood into the walls of the arteries. It provides blood to the pancreatic duct.

10. What is arteriosclerosis? deposition of fatty plaques inside the artery walls coronary heart disease high blood cholesterol loss of elasticity of the artery walls