Write the feature that distinguishes between the two: Sino-atrial node and Atrio-ventricular node.
(N/A) $SA$ node: It is a specialized patch of nodal tissue present in the right upper corner of the right atrium. It acts as the natural pacemaker of the heart as it initiates the rhythmic contractile activity of the heart.
$AV$ node: It is a specialized mass of cardiac tissue located in the lower left corner of the right atrium close to the atrio-ventricular septum. It receives the action potential from the $SA$ node and delays it slightly before transmitting it to the bundle of His.
$AV$ node: It is a specialized mass of cardiac tissue located in the lower left corner of the right atrium close to the atrio-ventricular septum. It receives the action potential from the $SA$ node and delays it slightly before transmitting it to the bundle of His.
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The thread-like tendons of papillary muscles inserted upon the flaps of tricuspid and bicuspid valves are:
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View SolutionMitral valve and tricuspid valve are attached to the papillary muscles by . . . . . . .
Given below are two statements.
Statement $I$ - The heart sound $Dub$ is heard during ventricular diastole.
Statement $II$ - The heart sound $Lubb$ is heard during atrial systole.
In the light of above statements,select the correct option given below:
Statement $I$ - The heart sound $Dub$ is heard during ventricular diastole.
Statement $II$ - The heart sound $Lubb$ is heard during atrial systole.
In the light of above statements,select the correct option given below:
Assertion : $Lub$ is a heart sound which is produced during each cardiac cycle.
Reason : It is associated with the closure of the tricuspid and bicuspid valves.
Reason : It is associated with the closure of the tricuspid and bicuspid valves.
DifficultAIIMS 2016
View SolutionWhich organ is known as the reservoir of red blood cells (RBCs)?
Medium
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