Biology Body Fluids and Circulation Circulatory Pathways and Human Circulatory System Single Correct MCQ
Published on: August 11, 2026

SA node is located in

A
Upper left corner of right atrium
B
Lower left corner of left atrium
C
Lower right corner of left atrium
D
Upper right corner of right atrium

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The correct answer is:
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SA node is present in upper lateral wall of right atrium. It helps in production of electrical signal that travels through the heart, causing it to beat rhythmically.

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