Final answer:
The SA node is located in the right atrium, near the superior vena cava, and serves as the pacemaker of the heart. The Bundle of His is located in the interventricular septum of the heart.
Explanation:
The SA node (sinoatrial node) is located in the superior and posterior walls of the right atrium, near the entrance of the superior vena cava. It serves as the primary pacemaker of the heart, initiating the normal electrical pattern for heart contractions.The Bundle of His (atrioventricular bundle) is a continuation of the AV node and is found in the interventricular septum of the heart.
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