Question

fill in the blank question
the portion of the cardiac conduction system located in the right atrium, near the opening of the superior vena cava is the

Explanation:

The sino - atrial (SA) node is located in the right atrium near the opening of the superior vena cava and is part of the cardiac conduction system. It acts as the natural pacemaker of the heart.

Answer:

sino - atrial (SA) node