Introduction Answers

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1
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The heart is composed of muscle called

A
atrium.
B
ventricle.
C
artery.
D
myocardium.
2
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The coronary veins bring to the right atrium of the heart.

A
oxygen-rich blood
B
oxygen-poor blood
C
carbon dioxide-poor blood
3

The coronary arteries bring to the heart muscle.

A
oxygen-rich blood
B
oxygen-poor blood
C
carbon dioxide-rich blood

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