Review: The Electrical System

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Across
  1. 4. initiate contraction of right & left ventricle
  2. 8. receives nerve impulse from the SA node
  3. 9. located in the bottom wall of the right atrium
Down
  1. 1. referred to as a pacemaker
  2. 2. located in the upper wall of the right atrium
  3. 3. specialized fibres that relay signal from AV node to Purkinje fibres
  4. 5. bundle of his are located in this structure of the heart
  5. 6. contract when they receive electrical signal from SA-node
  6. 7. stimulus that triggers a heartbeat