SCIENCE
CIRCULATORY SYSTEM
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
SA Node
|
|
|
Bundle of His
|
|
|
AV Node
|
|
|
Purkinje Fibers
|
Detailed explanation-1: -After passing through the AV node, the electrical current then continues down the conduction pathway, through a pathway called the bundle of His, and into the ventricles.
Detailed explanation-2: -The 2 upper chambers of the heart (atria) are stimulated first and contract for a short period of time before the 2 lower chambers of the heart (ventricles). The electrical impulse travels from the sinus node to the atrioventricular node (also called AV node).
Detailed explanation-3: -What causes second-degree heart block? Most people with second-degree heart block have an underlying heart condition like coronary heart disease, cardiomyopathy or congenital heart disease. It can also be caused by: ageing of the electrical pathways in your heart (so you’re more likely to get it if you’re older)
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.