MICROANATOMY

BLOOD CARDIOVASCULAR SYSTEM LYMPHOID ORGANS

CARDIOVASCULAR SYSTEM

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Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]

What is the correct order of parts of the heart conduction system?

A	AV node, SA node, bundle of His, purkinje fibers
B	purkinje fibers, SA node, AV node, bundle of His
C	SA node, AV node, bundle of His, purkinje fibers
D	None of the above

Explanation:

Detailed explanation-1: -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-2: -The SA (sinoatrial) node generates an electrical signal that causes the upper heart chambers (atria) to contract. The signal then passes through the AV (atrioventricular) node to the lower heart chambers (ventricles), causing them to contract, or pump. The SA node is considered the pacemaker of the heart.

Detailed explanation-3: -Sinoatrial node. Atrioventricular node. Bundle of His (atrioventricular bundle). Purkinje fibers. 23-Jul-2021

Detailed explanation-4: -The sino-atrial (SA) node. The atrio-ventricular (AV) node. The bundle of His. The left and right bundle branches. The Purkinje fibres.

There is 1 question to complete.