The portion of the intrinsic conduction system located in the superior interventricular septum is the a. AV node, b. SA node, c. AV bundle, d. subendocardial conducting network.

Verified step by step guidance

1. Identify the components of the intrinsic conduction system of the heart: SA node, AV node, AV bundle, and subendocardial conducting network.
2. Understand the location of each component: SA node is located in the right atrium, AV node is located at the junction of the atria and ventricles, AV bundle is located in the superior part of the interventricular septum, and the subendocardial conducting network is located in the ventricular walls.
3. Focus on the specific location mentioned in the problem: superior interventricular septum.
4. Recall that the AV bundle, also known as the bundle of His, is the component located in the superior interventricular septum.
5. Match the correct component with the given options: a. AV node, b. SA node, c. AV bundle, d. subendocardial conducting network.

Key Concepts

Intrinsic Conduction System

The intrinsic conduction system of the heart is a network of specialized cardiac muscle cells that generate and conduct electrical impulses, ensuring coordinated heart contractions. It includes key components such as the sinoatrial (SA) node, atrioventricular (AV) node, AV bundle, and Purkinje fibers, which work together to regulate the heart's rhythm and rate.

AV Bundle (Bundle of His)

The AV bundle, also known as the Bundle of His, is a critical part of the intrinsic conduction system located in the superior interventricular septum. It transmits electrical impulses from the AV node to the ventricles, splitting into right and left bundle branches that further distribute the impulses to the ventricular myocardium, facilitating synchronized contraction.

Interventricular Septum

The interventricular septum is the muscular wall that separates the left and right ventricles of the heart. It plays a vital role in maintaining the structural integrity of the heart and is essential for the proper functioning of the conduction system, particularly as it houses the AV bundle, which is crucial for effective ventricular contraction.