The intrinsic conduction system is made of

GENERAL PHYSIOLOGY

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

A	modified cardiac muscle cells that have no myofilaments.
B	modified neuron cell bodies.
C	axons of the parasympathetic nervous system.
D	modified cells of the fibrous skeleton.

Explanation:

Detailed explanation-1: -It is composed of the sinoatrial node (SAN), the atrioventricular node (AVN) and the His–Purkinje system.

Detailed explanation-2: -The intrinsic conduction system sets the basic rhythm of the beating heart by generating impulses which stimulate the heart to contract.

Detailed explanation-3: -The conducting system of the heart consists of cardiac muscle cells and conducting fibers (not nervous tissue) that are specialized for initiating impulses and conducting them rapidly through the heart (see the image below). They initiate the normal cardiac cycle and coordinate the contractions of cardiac chambers.

Detailed explanation-4: -Answer and Explanation: The b. Atrioventricular valve is not part of the intrinsic conduction system. The AV valve functions to prevent backflow of blood in the heart.

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