Question

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

• A. Inferior vena cava
• B. Superior vena cava
• C. Coronary sinus
• D. Pulmonary artery

Answer 1

The correct option is C

Coronary sinus

The correct option is C.

Explanation of the correct option:

1. Various small veins combine form a large vein of 3 cm which is called as the coronary sinus.
2. The sinus is formed by the union of great cardiac vein and oblique vein of left atrium.
3. The deoxygenated blood from the heart muscles drains into the coronary sinus.
4. The coronary sinus transfers it to the right auricle.

Explanation of the incorrect options:

Option A:

1. It is a large vein which collect the deoxygenated blood from the lower part of the body.
2. It brings impure blood from the major organs such as liver, intestine, and stomach.

Option B:

1. It is a large vein which collect the oxygenated blood from the upper part of the body.
2. It brings the impure blood from the important organs such as brain and head.

Option D:

Pulmonary artery:

It is the only artery which carries deoxygenated blood from heart to the lungs.

Final answer: The deoxygenated blood from the heart muscles drains into the coronary sinus.