Which of the following are characteristics of cardiac muscle?
A. It is under voluntary control and has intercalated discs.
B. It is self-exciting and controls blood vessels.
C. It is slow to contract and relax and is under voluntary control.
D. It has intercalated discs and is self-exciting.
E. It produces peristalsis and has intercalated discs.
D. It has intercalated discs and is self-exciting.
Cardiac muscle contains intercalated discs and is self-exciting.
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