Question

discribe cardiac circle​

Answer 1

The cardiac cycle describes all the activities of the heart through one complete heartbeat—that is, through one contraction and relaxation of both the atria and ventricles. ... Ventricular filling begins as the AV valves open and blood fills the ventricles. The ventricles remain in diastole during this period.

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Answer 2

Answer:

The cardiac cycle refers to the repeating pattern of contraction and relaxation of the heart.

The phase of contraction is systole and relaxation is diastole.