Answer :
Answer:
B. atrioventricular (AV) valve
Explanation:
The function of the conduction system of the heart is to spread the electric signal and make the heart contract in coordinated timing. Conduction starts at SA node, then the AV node then will spread by bundle branches.
The atrioventricular valve is not part of the conduction system. The valve function is to keep the blood flow back. If the valve is broken and blood did flow back, it can make the heart need to do more work than usual.
Option that doesn't belong to intrinsic conduction system of the heart as regards this question is B:atrioventricular (AV) valve.
- The intrinsic conduction system of the heart can be regarded as a system having several specialized subpopulations of cells.
- These cell can spontaneously generate electrical activity and they can as well conduct the excitation along the four chambers of the heart. They include sinoatrial (SA) node as well as atrioventricular (AV) node and bundle branches.
Therefore, option B is correct.
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