CARDIAC MUSCLE

2. Cardiac muscle tissue is one of the three types of _______ tissue.
5. It is responsible for keeping the heart pumping and blood circulating around the _______.
8. The heart acts as a ________ to propel blood.
11. Cardiac cells have only a single _________.
12. Exercise can __________ your cardiac muscle.
15. Cardiac muscle are one of _______ types of muscle tissue.
16. ________in a single nucleus.
17. Cardiac muscle cells also contain _________.
20. Cardiac muscle tissue, or myocardium, contains cells that expand and contract in __________ to electrical impulses from the nervous system.
21. Cardiac muscle cells appear striated or striped under a __________.
22. Pacemaker cells control the ________ of your heart.
23. Cardiac muscle fibers are ________ than skeletal muscle fibers.
24. Cardiac muscle ______ striations.
26. This through specialized cells called _______ cells.
27. When a cardiac muscle cell contracts, the ________ filament pulls the actin filaments toward each other.

1. Also _______ as a myocardium.
2. Cardiac muscle fibers also possess many mitochondria and _______.
3. Your nervous system sends _________ to pacemaker cells that prompt them to either speed up or slow down your heart rate.
4. Cardiac muscle also one of ______ of muscle tissue.
6. _________ of cardiac muscle is pumping blood.
7. Its contraction is not under ________ control.
9. cardiac muscle has __________.
10. Pacemaker cells are ________ to other cardiac muscle cells, allowing them to pass along signals.
13. The ______ acts as a pump to propel blood.
14. The cell uses ATP to ______ this contraction.
18. Cells joined end-to-end with ________ disk in between.
19. Involuntary heart ________ also a function of cardiac muscle.
21. Cardiac muscle also called heart muscle or ________.
22. ________ muscle is found in the heart wall.
23. Cardiac cells have only a _________ nucleus.
25. The heart acts as a pump to propel blood through the _______ vessels.