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1. |
The sino-atrial node is situated: |
A. | on the right of the opening of the inferior vena cava |
B. | within the interatrial septum |
C. | at the opening of the coronary sinus |
D. | just above the crista terminalis |
E. | around the lower superior vena cava |
Answer» E. around the lower superior vena cava | |