After the atrioventricular node, the impulse travels to the apex of the heart along the
- A. sinoatrial node
- B. coronary vein
- C. pulmonary vein
- D. bundle of His and Purkinje fibres
Explanation
The bundle of His carries the impulse down the septum and the Purkinje fibres spread it through the ventricle walls from the apex upwards, squeezing blood out efficiently. This pathway is why the ventricles contract as a unit.