The Heart's Conduction System

Question 1

Step 1:

Answer 1

SAN sets heart rate
Impulses spread through atria
Valves act as barrier (closed)

Question 2

Step 2:

Answer 2

Impulses picked up by AVN

Descends ventricle via Bundle of His

Question 3

Step 3:

Answer 3

Ventricles contact via purkinje fibres