What is the complete contraction and relaxation of heart called?

What is the complete contraction and relaxation of heart called?

Published: 20-Sep-2020

(a) Heart attack

(b) Heart failure

(c) Heart beat

(d) Heart block

Answer: Heart beat

SSC | Subject : Biology | Chpater : Transport in Organisms

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What is the complete contraction and relaxation of heart called?

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