ANATOMY
CHEST AND CARDIOVASCULAR
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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5, 1, 2, 3, 4, 6
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2, 1, 5, 3, 4, 6
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5, 6, 2, 3, 4, 1
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2, 6, 5, 3, 4, 1
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Detailed explanation-1: -The SA node (physiologicalpacemaker) starts the sequence by generating an electrical impulse, causing the atrial muscles to contract. From there, the signal travels to the AV node, then through the bundle of His, down the bundle branches, and through the Purkinje fibers, causing the ventricles to contract.
Detailed explanation-2: -The SA node starts the sequence by causing the atrial muscles to contract. That’s why doctors sometimes call it the anatomical pacemaker. Next, the signal travels to the AV node, through the bundle of HIS, down the bundle branches, and through the Purkinje fibers, causing the ventricles to contract.
Detailed explanation-3: -The AV node tapers down into the bundle of His, which passes into the ventricular septum and divides into two bundle branches, the left and right bundles. Sometimes the ‘left and right bundles of His’ are called Purkyně or Purkinje fibers. The ultimate distribution cannot be completely shown in this diagram.
Detailed explanation-4: -Sinoatrial node. Atrioventricular node. Bundle of His (atrioventricular bundle). Purkinje fibers. 23-Jul-2021