Question

Define cardiac cycle​

Answer 1

Cardiac Cycle:

The cardiac cycle is defined as a sequence of alternating contraction and relaxation of the atria and ventricles in order to pump blood throughout the body. ... Both the atria and the ventricles undergo alternating states of systole and diastole.

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Explanation:

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Answer 2

Answer:

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♥　　$\rm\underline\red{Cardiac~~Cycle~:-}$

→ Cardiac events that occur from the beginning of one heartbeat to the beginning of the next is called $\sf\green{Cardiac~~Cycle}$ .

• Its duration is about $\sf\red{0.8}$ sec .

Cardiac cycle consists of 3 phases :

1. $\sf\blue{Atrial~~Systole}$
2. $\sf\blue{Ventricular~~Systole}$
3. $\sf\blue{Cardiac~~Diastole}$

→ In this cycle blood enters the atria from pulmonary veins and venacavae .

→ From atria blood flows into ventricles through atrioventricular apertures.

• The semilunar valves are closed at this stage .

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