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Question

The deoxygenated blood from the heart muscles (myocardium) drains into the

A
inferior vena cava
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B
superior vena cava
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C
coronary sinus
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D
pulmonary artery
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Solution

The correct option is C coronary sinus
The right and left coronary veins drain deoxygenated blood from the heart muscles (myocardium) into the coronary sinus. The coronary sinus transfers it to the right auricle.

Inferior vena cava collects the deoxygenated blood from the lower body parts and drains it to the right auricle.
Superior vena cava collects the deoxygenated blood from the upper body parts and drains it to the right auricle.
The deoxygenated blood is drained from the right auricle to the right ventricle through the right auriculoventricular foramen. The right ventricle then pumps the blood through the pulmonary trunk which later divides into right and left pulmonary arteries. The pulmonary arteries carry deoxygenated blood to the lungs for oxygenation.

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