Skip to content
Back to quiz
6. Do veins have a thick or thin muscle wall?
7. What are the networks of capillaries in tissues called?
- capillary bases
- Capillary beds
- capillary networks
8. What do the cords in the heart do?
- keep the atria in shape
- keep the ventricles in shape
- attach the atrioventricular valves to the ventricles to stop them being forced up into the atria when the ventricles contract
- attach the semilunar valves to the ventricles to stop them being forced up into the aorta
9. What does the pulmonary vein do?
- pump oxygenated blood to the body
- brings oxygenated blood back from the lungs
- bring deoxygenated blood back from the body
- Pump deoxygenated blood to the lungs
10. Why are capillary walls (endothelium) only one cell thick?
- To speed up diffusion
- To make them smaller
11. Why do the ventricles have thicker walls than the atria?
- because they have to push blood out of the heart, whereas the atria just need to push blood a short distance to the ventricles
- they contain more blood so need more support
12. What does the pulmonary artery do?
- pump oxygenated blood to the body
- Pump deoxygenated blood to the lungs
- bring deoxygenated blood back from the body
- bring oxygenated blood back from the lungs
13. If there is higher pressure behind a valve, is it forced open or shut?
14. Why do arteries have elastic tissue in the walls?
- to cope with the high pressure caused by the heartbeat
- to expand in case of clot
- in case of damage
15. Do arteries contain valves?
16. Why does the left ventricle have thicker walls than the right ventricle?
- needs to contract powerfully to pump blood all the way round the body but right side only needs to get blood to the lungs, which are nearby
- less well supported
17. Why is the endothelium in the artery folded?
- to allow the artery to expand, helping it to cope with high pressure
- to give it a large surface area
18. Which has a larger lumen - arteries or veins?
