Question

question 19

the great cardiac vein drains blood into the

a a) superior vena cava.
b b) inferior vena cava.
c c) coronary sinus.
d d) coronary sulcus.
e e) aorta.

Explanation:

Identify the function of the great cardiac vein

The great cardiac vein travels through the anterior interventricular sulcus and drains the left atrium and both ventricles.

Determine the drainage pathway

It flows superiorly and wraps around to the posterior aspect of the heart, where it empties directly into the coronary sinus.

Select the correct option

The coronary sinus then empties this deoxygenated blood into the right atrium. Therefore, the great cardiac vein drains into the coronary sinus.

Answer:

• (A) superior vena cava.
• (B) inferior vena cava.
• (C) coronary sinus. (Correct answer)
• (D) coronary sulcus.
• (E) aorta.