11 4
Look at the picture.
It shows an artificial heart.
vena cava
aorta
part A
pulmonary artery pulmonary veins part B
(a) What structure in the real heart does part A replace? ................................................................................................................................................... .............................................................................................................................................. [1]
(b) Part A and part B in the artificial heart pump blood to different places.
Part B has to work the hardest.
Explain why. ................................................................................................................................................... .............................................................................................................................................. [2]
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