Question

The rhythmic expansion and contraction of the heart is called​

Answer 1

• The contraction of heart is called cardiac systole, whereas expansion or relaxation is called cardiac diastole. We can altogether call it a cardiac cycle. Complete answer: The rhythmic contraction and expansion of the heart is a Cardiac cycle.

hope it helps

Answer 2

Answer:

heart beat

systole and diastole is the right answer for your question