Question

match the components of the cardiac conduction system with their description.
1 sinusrial (sa) node 2 av bundle 3 atrioventricular (av) node 4 subendocardial conducting network (purkinje fibers)
match each of the options above to the items below.
the pacemaker that determines the heart rate
the electrical gateway to the ventricles
signals leave the av node and descend along this structure toward the apex
distributes the electrical excitation to the ventricles

Explanation:

• The SA node is the natural pacemaker of the heart, setting the heart rate.
• The AV node acts as the electrical gateway from atria to ventricles.
• The AV bundle (bundle of His) carries signals from the AV node towards the apex.
• The Purkinje fibers distribute electrical excitation throughout the ventricles for coordinated contraction.

Answer:

1. Sinuatrial (SA) node
2. Atrioventricular (AV) node
3. AV bundle
4. Subendocardial conducting network (Purkinje fibers)