Question

expian cardiaccycle​

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

Explanation:

The cardiac cycle is the performance of the human heart from the ending of one heartbeat to the beginning of the next. It consists of two periods: one during which the heart muscle relaxes and refills with blood, called diastole, followed by a period of robust contraction and pumping of blood, dubbed systole.