The ________ Is a Small Aggregation of Specialized Cardiac Muscle

question 23

Multiple Choice

The ________ is a small aggregation of specialized cardiac muscle tissue that acts as a pacemaker and initiates the heartbeat.

• A) cardiac plexus
• B) angina pectoris
• C) bundle of His
• D) atrioventricular node
• E) sinoatrial node

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