Across
- 4. the contraction of the heart is initiated by this
- 6. valve between the right atrium and ventricle
- 9. High intensity exercise
- 12. a graph that can show us the electrical activity of the heart
- 13. the node that holds the impulse for 0.1 seconds
- 14. the phase when the heart is contracting
- 18. muscle between the two ventricles
- 19. the law that states that due to a continuing increase in venous return a continued increase in stroke volume will occur
Down
- 1. the phase when the heart is relaxed
- 2. a wave of this is sent across both atria to cause systole
- 3. the hormone that enables anticipatory rise
- 5. the name given to the Pulmonary and Aortic valve
- 7. the volume of blood ejected from the heart per beat
- 8. the valve between the left atria and ventricle
- 10. volume of blood ejected from the left ventricle per minute
- 11. the volume of blood returning to the heart
- 15. low to moderate intensity exercise
- 16. the speed at which our heart beats
- 17. the fibres that surround the ventricles