Select the correct option:(1) The pericardium | vedclass

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(C) $(1)$ The heart is protected by a double-walled membranous bag called the pericardium,enclosing the pericardial fluid.$(2)$ The $SA$ node (Sino-at

Vedclass · Accepted Answer

Both $(1)$ and $(2)$ are correct.

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(C) $(1)$ The heart is protected by a double-walled membranous bag called the pericardium,enclosing the pericardial fluid.$(2)$ The $SA$ node (Sino-atrial node) is the natural pacemaker of the heart,capable of generating the maximum number of action potentials ($70-75$ per minute),which is higher than the $AV$ node (Atrio-ventricular node). Therefore,both statements are correct.

Select the correct option:
$(1)$ The pericardium is a double-layered membrane surrounding the heart.
$(2)$ The $SA$ node has a higher rate of impulse generation compared to the $AV$ node.

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Select the correct option:$(1)$ The pericardium is a double-layered membrane surrounding the heart.$(2)$ The $SA$ node has a higher rate of impulse generation compared to the $AV$ node.