What are SAN and AVN ? Where are they located? What is their function? Which are the other structures they work with? Name 2 other structures. What is the result of their role?
(5 Marks)
class 11
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Answer:
The sinoatrial node (SA node) is a specialized myocardial structure that initiates the electrical impulses to stimulate contraction, and is found in the atrial wall at the junction of superior caval vein and the right atrium.
Explanation:
The atrioventricular node (AVN) is a complex structure that performs a variety of functions in the heart. The AVN is primarily an electrical gatekeeper between the atria and ventricles and introduces a delay between atrial and ventricular excitation, allowing for efficient ventricular filling.
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