CARDIAC MUSCLE

4. Cardiac muscle tissue is one of the three types of _______ tissue.
6. The heart acts as a pump to propel blood through the _______ vessels.
8. Cardiac muscle tissue, or myocardium, contains cells that expand and contract in __________ to electrical impulses from the nervous system.
11. This through specialized cells called _______ cells.
13. Cardiac muscle ______ striations.
14. Cardiac muscle also called heart muscle or ________.
18. The cell ______ ATP to power this contraction.
19. Cardiac muscle also one of ______ of muscle tissue.
20. Pacemaker cells control the ________ of your heart.
22. Involuntary heart ________ also a function of cardiac muscle.
25. Cardiac muscle fibers also possess many mitochondria and _______.
26. _________ of cardiac muscle is pumping blood.
27. ________ muscle is found in the heart wall.
29. It is responsible for keeping the heart pumping and blood circulating around the _______.
30. Cardiac muscle are one of _______ types of muscle tissue.

1. The cell uses ATP to ______ this contraction.
2. Your nervous system sends _________ to pacemaker cells that prompt them to either speed up or slow down your heart rate.
3. Cardiac muscle fibers are ________ than skeletal muscle fibers.
5. Cardiac cells have only a _________ nucleus.
7. The heart acts as a ________ to propel blood.
9. cardiac muscle has __________.
10. Cardiac cells have only a single _________.
12. Cardiac muscle cells appear striated or striped under a __________.
13. The ______ acts as a pump to propel blood.
14. When a cardiac muscle cell contracts, the ________ filament pulls the actin filaments toward each other.
15. Cells joined end-to-end with ________ disk in between.
16. Cardiac muscle cells also contain _________.
17. Pacemaker cells are ________ to other cardiac muscle cells, allowing them to pass along signals.
21. Exercise can __________ your cardiac muscle.
23. ________in a single nucleus.
24. Its contraction is not under ________ control.
28. Also _______ as a myocardium.