what causes the heartbeat
Answers
Answered by
1
Explanation:
Your heartbeat is triggered by electrical impulses that travel down a special pathway through your heart: SA node (sinoatrial node) – known as the heart's natural pacemaker. The impulse starts in a small bundle of specialized cells located in the right atrium, called the SA node.
Answered by
3
Answer:
The contraction and relaxation of muscles of the heart on the walls of the heart constitute a heartbeat.
Similar questions