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B3c- Keep it Moving

1. The job of the heart is to p......... blood to the l............. and around the
b...............
2. Patients, who need a heart transplant usually have to wait for a long time. The
reasons for this are:
S............. of d...................
Patients need heart with a matching…

Page 2

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a) What substance travels in the direction show by the arrows?
............................
b) Alveoli are adapted for efficient diffusion. Describe two ways in which
they are adapted:


.......................................................................................................................................................
...............................................................................................................
c) Oxygen combines with haemoglobin in red blood cells. Write a word
equation to show how oxygen combines haemoglobin, in the…

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