AV node is found

in the right upper corner of right atrium

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between right atrium and left ventricle

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lower left corner of right atrium

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both b and c are correct

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Solution

The correct option is D both b and c are correct
A mass of neuromuscular tissue called the sinoatrial node (SAN) is found in the wall of the right atrium near the opening of the superior vena cava (upper right corner of the right atrium).
Another mass of neuromuscular tissue called the atrioventricular node (AVN) is found in the lower left corner of the right atrium between the right atrium and left ventricle at the junction of the interatrial and interventricular septum.

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The cardiac impulse is initiated and conducted further upto ventricle. The correct sequence of conduction of impulse is
$\begin{matrix} (a) & S A N o d e & A V N o d e & P u r k i n j e f i b e r & A V B u n d l e (b) & S A N o d e & P u r k i n j e f i b e r & A V N o d e & A V B u n d l e (c) & S A N o d e & A V N o d e & A V B u n d l e & P u r k i n j e f i b e r (d) & S A N o d e & P u r k i n j e f i b e r & A V B u n d l e & A V N o d e \end{matrix}$

What is SA node and AV node? Where are they located? What are their functions?

Q. The number of SA node and AV node in humans are

Q. Mark the odd one in each of the following series:
Purkinje fibres, AV bundle, AV valve, SA node.

Q. The portion of electrocardiogram related to the propagation of the cardiac impulse between the SA node and the AV node is the ......... interval

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Human Heart

Standard XII Biology

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