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The blood that enters the coronary artery comes from the


A) pulmonary artery.
B) pulmonary vein.
C) aorta.
D) superior vena cava.
E) inferior vena cava.

F) A) and B)
G) A) and C)

Correct Answer

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Which blood vessel has the highest concentration of carbon dioxide?


A) pulmonary artery
B) pulmonary vein
C) aorta
D) renal vein
E) hepatic portal vein

F) C) and D)
G) A) and B)

Correct Answer

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Capillaries exchange oxygen and nutrients for wastes in the tissues.

A) True
B) False

Correct Answer

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The sound of a heartbeat results when the ventricles contract and blood is surged out of the heart.

A) True
B) False

Correct Answer

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