Cardiac Cycle Crossword
Across
3. located in the right atrial wall initiates the signal
4. Some cardiac muscles are self-excitable and can initiate their own depolarization and that of the rest of the heart.
6. deflection wave that results from the repolarization or relaxation of the ventricles
7. deflection wave that results from atrial depolarization and contraction
8. wave deflection wave that results from ventricular depolarization
9. Control exerted on an organ from an outside source
10. refers to all of the events associated with the flow of blood through the heart during one complete heartbeat.
14. Control exerted from an organ to control its own function
15. another name for the atrioventricular bundle
16. system that hyperpolarizes the heart and thus the SA node does not fire as often
Down
1. Contraction of the heart muscle
2. a recording of the electrical changes that occur in the myocardium during the cardiac cycle
3. system that allows the heart to reach threshold faster and the SA node to fire faster
5. Relaxation of heart muscle
7. Pass through the outer walls depolarize the large ventricular muscles
11. signals the ventricle to contract
12. sound as semilunar valves close
13. sound as atrioventricular valves close