Question
Explain the difference between Sinu Auricular Node and Auriculo Ventricular Node.

Answer

Differences between Sinu Auricular Node and Auriculo Ventricular Node :
S.No.Sinu Auricular NodeAuriculo Ventricular Node
1. It is called SA node. This is called AV node.
2. It is situated on the wall of the right atrium. It is located near the ventricle at the posterior end of the inter-auricular septum.
3. It starts the heartbeat. This is called speed driver. It receives the impulse waves of the heart and conducts them in the muscle fibres of the bundle of His.
4. There are no Fibrous cord and His bundle in it. It contains Fibrous cord and His bundle.
5. The cardiac centre located in the medulla controls It stimulated by cardiac impulse waves originating from the SA node.

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