Difference between SA node and AV node
Difference between SA node and AV node are in tabular form below –
No. |
SA node |
AV node |
Definition |
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1. | A node which is present in the walls of the right atrium and sends impulses to contract, known for pacemaker of the heart, this is known as SA node. | A node which is present on the right side of lower part of atrial septum and it convey impulses form intermodal tracts to ventricles, this is known as AV node. |
Also known for |
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2. | This is also called as pacemaker of the heart. | This is also called as pacesetter of the heart. |
Shape |
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3. | This is flattened, ellipsoidal and longer type of node. | This is a half oval and short type of node. |
Regulation |
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4. | The autonomic nervous system regulates this SA node. | The SA node regulates AV node. |
Closely located to the |
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5. | This node is closely located to the opening of superior vena cava. | This node is closely located to the opening of coronary sinus. |
Transmission |
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6. | Here, cardiac impulses are transmitted to the left and right atrium. | Here, cardiac impulses are transmitted to the left and right the ventricles. |