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GK (Biology)
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The atrioventricular node is situated
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A
at the base of inter-auricular septum
💡 Explanation:
The atrioventricular (AV) node is located at the base of the interatrial (inter-auricular) septum, between the right atrium's lower part and the fibrous ring. It's not near the bicuspid valve (A), between atria generally (B), or in the interventricular septum (D).