Question
Explain the difference between Sinu Auricular Node and Auriculo Ventricular Node.
| S.No. | Sinu Auricular Node | Auriculo 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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Column I
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Column II
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a.
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Cristae
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i.
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Flat membranous sacs in stroma.
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b.
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Cisternae
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ii.
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Infoldings in mitochondria.
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c.
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Thylakoids
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iii.
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Disc-shaped sacs in Golgi apparatus.
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