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The bundle of His and the Purkinje fibres are part of the conduction system of the heart. In order to pump blood around the body, the heart muscle must contract (atria first to fill the ventricles, then ventricles contract to send the blood around the body.) The conduction system starts in the sinoatrial node (SA node) which is also known as the hearts natural pacemaker and is located at the top of the right atrium. The impulse is then sent to the atrioventricular node (AV node) located by the junction between the atria and ventricles. The next part of the conduction system is the bundle of His which sends the impulse from the atria to the ventricles. The purkinje fibres then spread through the ventricles. As the impulse passes through each part of the conduction system, that part of the heart is excited and the heart muscle contracts, which gives the pumping action of the heart.
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What is the name of the structure in the heart which distributes the electrical impulses to the ventricles?
Bundle of Hisatrioventicular bundle (bundle of his), right and left bundle bramches and the purkinge conducition fibers
The correct sequence in the conduction system of the heart is?
SA node, Internodal pathways, AV node, Bundle of His, Bundle branches, Purkinje fibers.
What are the structures involved in the conduction system of the heart?
Internal pacemaker , sinoatrial(sa) node, atrioventricular (av) node , atrioventricular bundle (bundle of his ) and purkinje fibres.
What is a bundle branch composed of?
Purkinje fibers.
What are the four structures that compose the conduction system of the heart?
1. SA Node ----> 2. AV Node---> 3. AV Bundle (bundle of HIS)----> 4. Purkinje Fibers
What is the firing order of electricity in the human heart?
SA node, AV node, Bundle of His, Purkinje fibers
Network that stimulates the myocardium into contraction?
His bundle? or the Purkinje fibers?
The normal pattern of impulse conduction through the heart is?
SA node, AV node, AV Bundle, Bundle branches, subedocardial branches (purkinje fibers)
Is the heart contracting sequence purkinje fiberssa nodesa nodeav bundle?
The heart's contraction sequence starts with the sinoatrial (SA) node, which initiates the electrical impulse that causes the atria to contract. This impulse then travels to the atrioventricular (AV) node, where it is briefly delayed before moving to the AV bundle (Bundle of His). From there, the impulse spreads through the right and left bundle branches and into the Purkinje fibers, leading to the contraction of the ventricles. Thus, the correct sequence is SA node, AV node, AV bundle, and then Purkinje fibers.
Which structure of the heart provides the stimulation that causes the ventricles to contract?
purkinje fibers
What is the sequence of structures that allows the normal sequence of excitation to progress through the heart?
SA node- AV node- Bundle of His- Purkinje fibers
What are the Fibers of the conduction system of the heart?
Fibers of the conduction system of the heart is called Purkinje fibers
