conducting system of heart
Answers
Answer:
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.
Answer:
Conducting system of heart :
(1) The heartbeat in human beings originates in modified cardiac muscles called sinoatrial node (S.A. node). therefore, the heart is said to be myogenic.
(2) The conducting system of heart consists of sinoatrial node (SAN), atrioventricular node (AVN), Bundle of His and Purkinje fibres.
(3) The heart shows auto-rhythmicity as the impulse for its rhythmic movement during beating is developed inside the heart.
(4) The autorhythmic fibres are developed during embryonic life. They act as pacemaker by setting the rhythm for the heart. They also form conducting system for conducting impulses throughout heart muscles.
(5) The impulse travels in the heart in the following manner: Sinoatrial node (Pacemaker) Internodal pathway - Atrioventricular node Bundle of His Right and left bundle branches Purkinje fibres.