Question:
SA node located in the
SA node located in the
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Remember the anatomical sequence of the heart's conduction system: SA Node (Right Atrium) \(\rightarrow\) AV Node (interatrial septum) \(\rightarrow\) AV Bundle of His \(\rightarrow\) Purkinje fibers.
Updated On: Jul 8, 2026
- Aorta
- Left Ventricle
- Right atrium
- Left atrium
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The Correct Option is C
Solution and Explanation
Step 1: Understanding the Concept:
The rhythmic contraction of the heart is driven by a specialized intrinsic conduction system composed of modified cardiac muscle cells.
Step 3: Detailed Explanation:
The Sinoatrial (SA) node is a small, specialized mass of cardiac muscle tissue that acts as the primary pacemaker of the heart.
It is located in the superior, posterolateral wall of the right atrium, just inferior to the opening of the superior vena cava.
The SA node spontaneously depolarizes and generates action potentials at a faster rate than any other cardiac tissue, setting the resting heart rate.
Step 4: Final Answer
The sinoatrial (SA) node is anatomically located in the wall of the right atrium.
The rhythmic contraction of the heart is driven by a specialized intrinsic conduction system composed of modified cardiac muscle cells.
Step 3: Detailed Explanation:
The Sinoatrial (SA) node is a small, specialized mass of cardiac muscle tissue that acts as the primary pacemaker of the heart.
It is located in the superior, posterolateral wall of the right atrium, just inferior to the opening of the superior vena cava.
The SA node spontaneously depolarizes and generates action potentials at a faster rate than any other cardiac tissue, setting the resting heart rate.
Step 4: Final Answer
The sinoatrial (SA) node is anatomically located in the wall of the right atrium.
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