1. 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
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Other questions in this quiz
2. What do the cords in the heart do?
- 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
- keep the atria in shape
- keep the ventricles in shape
3. Which has a larger lumen - arteries or veins?
4. What does the vena cava do?
- pump deoxygenated blood to the lungs
- bring oxygenated blood back from the lungs
- bring deoxygenated blood back from the body
- pump oxygenated blood to the body
5. If there is higher pressure behind a valve, is it forced open or shut?