Question

Q.2 Expand SAN and AVN
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Answer 1

The sinoatrial node (SAN) is a region of cardiac fibres located in the right atrium. The electrical wave of stimulation is initiated here and extends over the two atria, causing them to contract. It is often referred to as the pacemaker of the heart.

The SA node is also called the sinus node. The electrical signal generated by the SA node moves from cell to cell down through the heart until it reaches the atrioventricular node (AV node), a cluster of cells situated in the center of the heart between the atria and ventricles.

The SA node is the primary; the atrioventricular node (AV node), located in a bundle of tissues on the border between the right atrium and the right ventricle, is the secondary. When the SA node sends out an electrical impulse, the first place it goes is to the AV ...

Answer 2

Answer:

SAN stands for sinoatrial node and AVN stands for atrioventricular node

Explanation:

• One of the key components of the cardiac conduction system, which regulates heart pace, is the SA node (SA stands for sinoatrial).
• It starts the heartbeat by starting electric impulses. The SA node is where the electrical impulses are produced. The sinus node is another name for the SA node.
• The atrioventricular node (AV node), which receives electrical signals generated by the SA node, is reached after travelling through the heart's cells from cell to cell. It is a collection of cells that can be found in the middle of the heart, between the ventricles and atria.
• The SA node sends signals to the AV node.

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