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biology 0610printed 117 · PDF 117
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printed 117 · PDF 117
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Aitchison College Academic Resources.
The diagram shows a vertical section through a human heart.
SS
_\ L
Xx
Y
What are X and Y?
xX Y
A left atrium right ventricle
B left ventricle right atrium
c right atrium left ventricle
D | right ventricle left atrium
The diagrams show some components of the blood of a mammal.
Which component causes the blood to start clotting?
A B c
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