Question 4 (1 point)
Blood that has circulated through the myocardium of the heart and has dropped off
oxygen to supply the heart, returns to a large vein on the posterior aspect of the
heart. This vein drains into the right atrium. What is its name?

1. superior vena cava
2. coronary sinus
3. aorta
4. left pulmonary vein

The vein you’re looking for is the coronary sinus. This specialized vein collects the deoxygenated blood from the heart muscle itself, returning it to the right atrium. It’s like a backstage pass for the heart’s own blood, making sure it gets back to the right spot after all the hard work!

Did you know that the coronary sinus is a crucial component in the heart’s circulatory system? It plays a significant role in cardiac physiology, as it drains blood from multiple smaller veins collecting from the myocardium. So, next time you think about heart health, remember the mighty coronary sinus working behind the scenes!