After the atrioventricular node, the impulse travels to the apex of the heart along the
Correct answer: D. bundle of His and Purkinje fibres
- 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.
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The human heart is a four chambered muscular pump that maintains double circulation through the pulmonary and systemic circuits. Questions cover atria, ventricles, valves, major blood vessels, the cardiac cycle, pressure changes, the conduction system and ECG, while distinguishing arteries and veins from the chambers that receive or eject blood.
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