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Sino-atrial node is present in...

Sino-atrial node is present in

A

1)left ventricle

B

2)right ventricle

C

3)left atrium

D

4)right atrium

Text Solution

AI Generated Solution

The correct Answer is:
### Step-by-Step Solution: 1. **Understanding the Sino-Atrial Node (SA Node)**: The Sino-Atrial node, often referred to as the SA node, is a specialized group of cells located in the heart. It plays a crucial role in initiating the heartbeat and regulating the heart's rhythm. 2. **Identifying the Location**: The SA node is specifically located in the right atrium of the heart. More precisely, it is situated at the upper corner of the right atrium, just below the entrance of the superior vena cava. 3. **Analyzing the Options**: The question provides four options regarding the location of the SA node: - Option 1: Left ventricle - Option 2: Right ventricle - Option 3: Left atrium - Option 4: Right atrium 4. **Eliminating Incorrect Options**: - **Left Ventricle**: The SA node is not located here. (Incorrect) - **Right Ventricle**: The SA node is not located here. (Incorrect) - **Left Atrium**: The SA node is not located here. (Incorrect) 5. **Identifying the Correct Option**: The only remaining option is: - **Right Atrium**: This is the correct location of the SA node. 6. **Conclusion**: Therefore, the Sino-Atrial node is present in the right atrium. ### Final Answer: The Sino-Atrial node is present in the **right atrium**.
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