Slowest conducting pa in the hea is:
Both SA node and AV node contain slowly depolarizing cells. Both of them conduct impulse slowly. Velocity of impulse through both SA node and AV node is about 0.05 - 0.1 sec. In addition, AV node has 2 more propeies: Small diameter of fibers Fewer gap junctions between adjacent cells. These features make the AV node even slower in conducting the impulse.