Contraction of the cardiac muscle Specialized cells that do not… Image transcription textContraction of the cardiac muscle Specialized cells that do not contract; cardiac conduction system: SA node(sinoatrial node) : At the right atrium; initiates heartbeat. AV node (atrioventricular node): Causes ventricles tocontract. is also called the pacemaker because it keeps the heartbeat regular. Heartbeat is also c… … Science Biology Share This was created from Lecture 8 (0)
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