Biology, asked by zeem637, 10 months ago

Define cardiac cycle and explain it's different events

Answers

Answered by manishaupadhyay61997
3

Answer:

the sequence of events that occur when heart beat is called cardiac cycle ....there are two phases.1) when heart ventricle relaxed . systolic and 2) when ventricle relaxed then diastole

Answered by fahadmohdsheikh
4

Answer: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. A contraction event (of either the atria or ventricles) is referred to as systole, and a relaxation event is referred to as diastole. The cardiac cycle includes a description of the systolic and diastolic activities of the atria and ventricles, the blood volume and pressure changes within the heart, and the action of the heart valves. A description of each period of the cardiac cycle follows:

The isovolumetric ventricular relaxation is the period during which the ventricles are relaxed and both AV and semilunar valves are still closed. The volume of the ventricles remains unchanged (isovolumetric) during this period.

Ventricular filling begins as the AV valves open and blood fills the ventricles. The ventricles remain in diastole during this period.

Ventricular contraction (ventricular systole) begins as the action potential from the AV node enters the ventricles, the ventricles depolarize, and the QRS complex is observed on the ECG.

Explanation:please make me brainlist

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