The Cardiac Cycle

2. The node which provides the initial stimulus to generate a heartbeat.
3. The nerve which transports impulses from the autonomic nervous system to the heart.
4. Fibres found in the intraventricular septum which conduct the impulse to the tip of the ventricle.
5. The branch of the nervous system which causes the heart rate to slow.
10. The phase of the cardiac in which the heart is filling.
11. The location of the both cardiac nodes.
12. During exercise the diastole period is ____________.

1. The node which conducts the impulse from the atria to the ventricles.
2. The branch of the nervous system which acts to speed up heart rate.
6. The volume of blood forced out of the heart during ventricular contraction.
7. Impulses generated without nervous stimulation.
8. The hormone released in times of stress which acts on the SAN resulting in an increased heart rate.
9. Stroke volume x heart rate.