Science, asked by lavishverma38, 5 months ago

What are contractions and relaxations of heart muscles called?

Heart beat

Capillaries

Answers

Answered by itzcrazypie12

3

Answer:

heart beat

hope it helps u dear....

Answered by TheDarkDevill

12

Heartbeat

Cardiac muscle contraction and heartbeat is regulated by a process known as excitation–contraction coupling (ECC).

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